Power supply method and apparatus

ABSTRACT

Embodiments of the present invention disclose a power supply method, including: rectifying a second alternating current, and converting the second alternating current into a second high voltage direct current; when the second high voltage direct current is abnormal, inputting a third high voltage direct current to a DC/DC module; when the second high voltage direct current is normal, inputting the second high voltage direct current to the DC/DC module; and converting, by the DC/DC module, the second high voltage direct current or the third high voltage direct current into a low voltage direct current for outputting.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2013/084540, filed on Sep. 27, 2013, which claims priority toChinese Patent Application No. 201310071433.1, filed on Mar. 6, 2013,both of which are hereby incorporated by reference in their entireties.

TECHNICAL FIELD

The present invention relates to the field of electronic communicationtechnologies, and in particular, to a power supply method and apparatus.

BACKGROUND

Referring to FIG. 1, an existing data center (or an equipment room) usesan alternating current power supply mode. To ensure reliability of thepower supply and power distribution for equipments of the whole datacenter, two sets of power supply systems are used to supply power in aredundant backup mode, and two mains supplies and diesel generatorssupply power to a lower-level load by using an ATS (Automatic TransferSwitches, automatic transfer switch) transfer equipment.

An alternating current output by the ATS is divided into two branches, abranch A and a branch B, by using an AC (Alternating Current,alternating current) distribution panel. The branch A is input to an UPS(Uninterruptible power supply, uninterruptible power supply) system A inthe equipment room, and the branch B is input to a UPS system B in theequipment room. The alternating currents output by the UPS system A andUPS system B are output to an ICT (Information Communication Technology,information communication technology) equipment cabinet in the equipmentroom after passing through a distribution cabinet and an array cabinetrespectively, to supply power to an ICT equipment.

Each ICT equipment cabinet receives the alternating currents output bythe UPS system A and UPS system B. The alternating current (A-planealternating current for short) from the UPS system A and the alternatingcurrent (B-plane alternating current for short) from the UPS system Bback up each other. Equipments in the ICT equipment cabinet may bepowered by the A-plane alternating current by using an A-channeldistribution unit and the B-plane alternating current by using aB-channel distribution unit.

In the existing power supply mode, each power module receives only onealternating current. If there are N (N is an integer greater than zero)A-plane alternating current power supply and B-plane alternating currentpower supply that back up each other, N+N power modules are required(“power supply A1” to “power supply AN” and “power supply B1” to “powersupply BN” in the figure). The number of power modules in an equipmentis relatively large, and a cost is relatively high.

SUMMARY

Embodiments of the present invention provide a power supply method, apower module, a power supply apparatus, a power supply system, and anICT equipment, which are capable of reducing costs.

An embodiment of the present invention provides a power supply method,which is applied to a power module, where the power module is configuredto adjust at least one input voltage and output a voltage to a load tosupply power to the load, where the power supply method includes:

rectifying an input second alternating current, and converting thesecond alternating current into a second high voltage direct current;

when detecting that the second high voltage direct current is abnormal,inputting an input third high voltage direct current to a DC/DC module;when detecting that the second high voltage direct current is normal,inputting the second high voltage direct current to the DC/DC module,where the input third high voltage direct current is in a standby stateat this time; and

converting, by the DC/DC module, the input second high voltage directcurrent or the third high voltage direct current into a low voltagedirect current, and outputting the low voltage direct current to theload for use.

In the power supply method, before rectifying the input secondalternating current, the power supply method further includes:

filtering the input second alternating current.

In the power supply method,

before inputting the input third high voltage direct current to theDC/DC module, the power supply method further includes:

filtering the input third high voltage direct current.

In the power supply method, after rectifying the input secondalternating current and before inputting the second alternating currentto the DC/DC module, the power supply method further includes:

performing power factor correction for a voltage after the secondalternating current is rectified.

An embodiment of the present invention further provides another powersupply method, including:

converting an input first alternating current into a first high voltagedirect current;

outputting, by a battery group, a standby high voltage direct currentwhen the first high voltage direct current is abnormal, where a thirdhigh voltage direct current is output after the battery group and thefirst high voltage direct current are connected in parallel;

rectifying an input second alternating current, and converting thesecond alternating current into a second high voltage direct current;

when detecting that the second high voltage direct current is normal,inputting the second high voltage direct current to a DC/DC module,where the third high voltage direct current that is output after thebattery group and the first high voltage direct current are connected inparallel is in a standby state at this time; and when detecting that thesecond high voltage direct current is abnormal, inputting the third highvoltage direct current to the DC/DC module; and

converting, by the DC/DC module, the input second high voltage directcurrent or the third high voltage direct current into a low voltagedirect current, and outputting the low voltage direct current to a loadfor use.

In the another power supply method, before rectifying the input secondalternating current, the power supply method further includes:

filtering the input second alternating current.

In the another power supply method, before inputting the third highvoltage direct current to the DC/DC module, the power supply methodfurther includes:

filtering the third high voltage direct current.

In the another power supply method, after rectifying the input secondalternating current and before inputting the second alternating currentto the DC/DC module, the power supply method further includes:

performing power factor correction for a voltage after the secondalternating current is rectified.

An embodiment of the present invention further provides a power module,including a rectifier module, a selecting module, and a DC/DC module,where:

the rectifier module is configured to rectify an input secondalternating current, and convert the second alternating current into asecond high voltage direct current for outputting;

the selecting module is connected to channels for inputting two highvoltage direct currents to the DC/DC module, where the two high voltagedirect currents include the second high voltage direct current and athird high voltage direct current;

the selecting module is configured to: when it is detected that thesecond high voltage direct current is normal, connect a channel forinputting the second high voltage direct current to the DC/DC module anddisconnect a channel for inputting the third high voltage direct currentto the DC/DC module; when it is detected that the second high voltagedirect current is abnormal, connect the channel for inputting the thirdhigh voltage direct current to the DC/DC module and disconnect thechannel for inputting the second high voltage direct current to theDC/DC module; and

the DC/DC module is configured to convert the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current, and output the low voltage direct current to aload for use.

The power module further includes a first EMI module, where

the first EMI module is configured to filter the third high voltagedirect current, and output the filtered third high voltage directcurrent to the selecting module.

The power module further includes:

the second EMI module, configured to filter the input second alternatingcurrent, and output the filtered second alternating current to therectifier module.

The power module further includes:

a PFC module, configured to perform power factor correction for avoltage after the second alternating current is rectified.

In the power module, in a first implementation manner, the selectingmodule includes:

a first voltage detecting module, configured to detect a voltage of thesecond high voltage direct current and that of the third high voltagedirect current, and when detecting that the voltage of the second highvoltage direct current is normal, output a disconnection signal to asecond driver module and output a connection signal to a first drivermodule; when detecting that the voltage of the second high voltagedirect current is abnormal, output a disconnection signal to the firstdriver module and output a connection signal to the second drivermodule;

the first driver module, configured to trigger, when receiving thedisconnection signal, a first switch module to disconnect the channelfor inputting the second high voltage direct current to the DC/DCmodule, and trigger, when receiving the connection signal and after thechannel for inputting the third high voltage direct current to the DC/DCmodule is disconnected, the first switch module to connect the channelfor inputting the second high voltage direct current to the DC/DCmodule;

the second driver module, configured to trigger, when receiving theconnection signal and after the channel for inputting the second highvoltage direct current to the DC/DC module is disconnected, a secondswitch module to connect the channel for inputting the third highvoltage direct current to the DC/DC module, and trigger, when receivingthe disconnection signal, the second switch module to disconnect thechannel for inputting the third high voltage direct current to the DC/DCmodule;

the first switch module, connected between the second high voltagedirect current and the DC/DC module, and configured to respond todriving of the first driver module, disconnect the channel for inputtingthe second high voltage direct current to the DC/DC module, and connectthe channel for inputting the second high voltage direct current to theDC/DC module; and

the second switch module, connected between the third high voltagedirect current and the DC/DC module, and configured to respond todriving of the second driver module, disconnect the channel forinputting the third high voltage direct current to the DC/DC module, andconnect the channel for inputting the third high voltage direct currentto the DC/DC module.

In the power module, in a second implementation manner, the selectingmodule includes:

a second voltage detecting module, configured to: detect a voltage ofthe second high voltage direct current and that of the third highvoltage direct current, and when detecting that the voltage of thesecond high voltage direct current is normal, output, to a third drivermodule, a signal for disconnecting the channel for inputting the thirdhigh voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the second high voltage directcurrent to the DC/DC module; when detecting that the voltage of thesecond high voltage direct current is abnormal, output, to the thirddriver module, a signal for disconnecting the channel for inputting thesecond high voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module;

the third driver module, configured to: trigger, when receiving thesignal for disconnecting the channel for inputting the second highvoltage direct current to the DC/DC module, and the signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module, a third switch module to disconnect thechannel for inputting the second high voltage direct current to theDC/DC module, and then trigger the third switch module to connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and trigger, when receiving the signal for disconnecting thechannel for inputting the third high voltage direct current to the DC/DCmodule, and the signal for connecting the channel for inputting thesecond high voltage direct current to the DC/DC module, the third switchmodule to disconnect the channel for inputting the third high voltagedirect current to the DC/DC module, and then trigger the third switchmodule to connect the channel for inputting the second high voltagedirect current to the DC/DC module; and

the third switch module, connected between two high voltage directcurrents and the DC/DC module, where the two high voltage directcurrents are the second high voltage direct current and the third highvoltage direct current, and configured to respond to driving of thethird driver module, disconnect the channel for inputting the secondhigh voltage direct current to the DC/DC module, and then connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and respond to driving of the third driver module, disconnectthe channel for inputting the third high voltage direct current to theDC/DC module, and then connect the channel for inputting the second highvoltage direct current to the DC/DC module.

An embodiment of the present invention further provides a power supplyapparatus, including an AC/DC module, a battery group, a rectifiermodule, a selecting module, and a DC/DC module, where:

the AC/DC module is configured to convert an input first alternatingcurrent into a first high voltage direct current for outputting;

the battery group is configured to output a standby high voltage directcurrent when the first high voltage direct current output by the AC/DCmodule is abnormal,

where a third high voltage direct current is output after the batterygroup and the AC/DC module are connected in parallel;

the rectifier module is configured to rectify an input secondalternating current, and convert the second alternating current into asecond high voltage direct current for outputting;

the selecting module is connected to channels for inputting two highvoltage direct currents to the DC/DC module, where the two high voltagedirect currents include the second high voltage direct current and thethird high voltage direct current;

the selecting module is configured to: when it is detected that thesecond high voltage direct current is normal, connect a channel forinputting the second high voltage direct current to the DC/DC module anddisconnect a channel for inputting the third high voltage direct currentto the DC/DC module; when it is detected that the second high voltagedirect current is abnormal, connect the channel for inputting the thirdhigh voltage direct current to the DC/DC module and disconnect thechannel for inputting the second high voltage direct current to theDC/DC module; and

the DC/DC module is configured to convert the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current, and output the low voltage direct current to aload for use.

The power supply apparatus further includes a first EMI module, where

the first EMI module is configured to filter the third high voltagedirect current, and output the filtered third high voltage directcurrent to the selecting module.

The power supply apparatus further includes a second EMI module, where

the second EMI module is configured to filter the input secondalternating current, and output the filtered second alternating currentto the rectifier module.

The power supply apparatus further includes:

a PFC module, configured to perform power factor correction for avoltage after the second alternating current is rectified.

In the power supply apparatus, in a first implementation manner, theselecting module includes:

a first voltage detecting module, configured to detect a voltage of thesecond high voltage direct current and that of the third high voltagedirect current, and when detecting that the voltage of the second highvoltage direct current is normal, output a disconnection signal to asecond driver module and output a connection signal to a first drivermodule; when detecting that the voltage of the second high voltagedirect current is abnormal, output a disconnection signal to the firstdriver module and output a connection signal to the second drivermodule;

the first driver module, configured to trigger, when receiving thedisconnection signal, a first switch module to disconnect the channelfor inputting the second high voltage direct current to the DC/DCmodule, and trigger, when receiving the connection signal and after thechannel for inputting the third high voltage direct current to the DC/DCmodule is disconnected, the first switch module to connect the channelfor inputting the second high voltage direct current to the DC/DCmodule;

the second driver module, configured to trigger, when receiving theconnection signal and after the channel for inputting the second highvoltage direct current to the DC/DC module is disconnected, a secondswitch module to connect the channel for inputting the third highvoltage direct current to the DC/DC module, and trigger, when receivingthe disconnection signal, the second switch module to disconnect thechannel for inputting the third high voltage direct current to the DC/DCmodule;

the first switch module, connected between the second high voltagedirect current and the DC/DC module, and configured to respond todriving of the first driver module, disconnect the channel for inputtingthe second high voltage direct current to the DC/DC module, and connectthe channel for inputting the second high voltage direct current to theDC/DC module; and

the second switch module, connected between the third high voltagedirect current and the DC/DC module, and configured to respond todriving of the second driver module, disconnect the channel forinputting the third high voltage direct current to the DC/DC module, andconnect the channel for inputting the third high voltage direct currentto the DC/DC module.

In the power supply apparatus, in a second implementation manner, theselecting module includes:

a second voltage detecting module, configured to: detect a voltage ofthe second high voltage direct current and that of the third highvoltage direct current, and when detecting that the voltage of thesecond high voltage direct current is normal, output, to a third drivermodule, a signal for disconnecting the channel for inputting the thirdhigh voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the second high voltage directcurrent to the DC/DC module; when detecting that the voltage of thesecond high voltage direct current is abnormal, output, to the thirddriver module, a signal for disconnecting the channel for inputting thesecond high voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module;

the third driver module, configured to: trigger, when receiving thesignal for disconnecting the channel for inputting the second highvoltage direct current to the DC/DC module, and the signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module, a third switch module to disconnect thechannel for inputting the second high voltage direct current to theDC/DC module, and then trigger the third switch module to connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and trigger, when receiving the signal for disconnecting thechannel for inputting the third high voltage direct current to the DC/DCmodule, and the signal for connecting the channel for inputting thesecond high voltage direct current to the DC/DC module, the third switchmodule to disconnect the channel for inputting the third high voltagedirect current to the DC/DC module, and then trigger the third switchmodule to connect the channel for inputting the second high voltagedirect current to the DC/DC module; and

the third switch module, connected between two high voltage directcurrents and the DC/DC module, where the two high voltage directcurrents are the second high voltage direct current and the third highvoltage direct current, and configured to respond to driving of thethird driver module, disconnect the channel for inputting the secondhigh voltage direct current to the DC/DC module, and then connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and respond to driving of the third driver module, disconnectthe channel for inputting the third high voltage direct current to theDC/DC module, and then connect the channel for inputting the second highvoltage direct current to the DC/DC module.

An embodiment of the present invention further provides a power supplysystem, including X AC/DC modules, W power modules, a power supply bus,and a battery group, where:

the power module is configured to adjust at least one input voltage andoutput the at least one input voltage to a load to supply power to theload, where the power module includes a rectifier module, a selectingmodule, and a DC/DC module;

the AC/DC module is configured to convert an input first alternatingcurrent into a first high voltage direct current for outputting;

where X first high voltage direct currents output by the X AC/DC modulesare input to the power supply bus;

the battery group is configured to output a standby high voltage directcurrent when the first high voltage direct currents output by the XAC/DC modules are abnormal;

a third high voltage direct current is output after the battery groupand the power supply bus are connected in parallel, where the third highvoltage direct current is input to the W power modules;

the rectifier module is configured to rectify an input secondalternating current, and convert the second alternating current into asecond high voltage direct current for outputting;

the selecting module is connected to channels for inputting two highvoltage direct currents to the DC/DC module, where the two high voltagedirect currents include the second high voltage direct current and thethird high voltage direct current;

the selecting module is configured to: when it is detected that thesecond high voltage direct current is normal, connect a channel forinputting the second high voltage direct current to the DC/DC module anddisconnect a channel for inputting the third high voltage direct currentto the DC/DC module; when it is detected that the second high voltagedirect current is abnormal, connect the channel for inputting the thirdhigh voltage direct current to the DC/DC module and disconnect thechannel for inputting the second high voltage direct current to theDC/DC module; and

the DC/DC module is configured to convert the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current, and output the low voltage direct current to theload for use;

where X and W are integers greater than 0.

The power supply system further includes a first EMI module, where

the first EMI module is configured to filter the third high voltagedirect current, and output the filtered third high voltage directcurrent to the selecting module.

The power supply system further includes a second EMI module, where

the second EMI module is configured to filter the input secondalternating current, and output the filtered second alternating currentto the rectifier module.

The power supply system further includes:

a PFC module, configured to perform power factor correction for avoltage after the second alternating current is rectified.

In the power supply system, in a first implementation manner, theselecting module includes:

a first voltage detecting module, configured to detect a voltage of thesecond high voltage direct current and that of the third high voltagedirect current, and when detecting that the voltage of the second highvoltage direct current is normal, output a disconnection signal to asecond driver module and output a connection signal to a first drivermodule; when detecting that the voltage of the second high voltagedirect current is abnormal, output a disconnection signal to the firstdriver module and output a connection signal to the second drivermodule;

the first driver module, configured to trigger, when receiving thedisconnection signal, a first switch module to disconnect the channelfor inputting the second high voltage direct current to the DC/DCmodule, and trigger, when receiving the connection signal and after thechannel for inputting the third high voltage direct current to the DC/DCmodule is disconnected, the first switch module to connect the channelfor inputting the second high voltage direct current to the DC/DCmodule;

the second driver module, configured to trigger, when receiving theconnection signal and after the channel for inputting the second highvoltage direct current to the DC/DC module is disconnected, a secondswitch module to connect the channel for inputting the third highvoltage direct current to the DC/DC module, and trigger, when receivingthe disconnection signal, the second switch module to disconnect thechannel for inputting the third high voltage direct current to the DC/DCmodule;

the first switch module, connected between the second high voltagedirect current and the DC/DC module, and configured to respond todriving of the first driver module, disconnect the channel for inputtingthe second high voltage direct current to the DC/DC module, and connectthe channel for inputting the second high voltage direct current to theDC/DC module; and

the second switch module, connected between the third high voltagedirect current and the DC/DC module, and configured to respond todriving of the second driver module, disconnect the channel forinputting the third high voltage direct current to the DC/DC module, andconnect the channel for inputting the third high voltage direct currentto the DC/DC module.

In the power supply system, in a second implementation manner, theselecting module includes:

a second voltage detecting module, configured to: detect a voltage ofthe second high voltage direct current and that of the third highvoltage direct current, and when detecting that the voltage of thesecond high voltage direct current is normal, output, to a third drivermodule, a signal for disconnecting the channel for inputting the thirdhigh voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the second high voltage directcurrent to the DC/DC module; when detecting that the voltage of thesecond high voltage direct current is abnormal, output, to the thirddriver module, a signal for disconnecting the channel for inputting thesecond high voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module;

the third driver module, configured to: trigger, when receiving thesignal for disconnecting the channel for inputting the second highvoltage direct current to the DC/DC module, and the signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module, a third switch module to disconnect thechannel for inputting the second high voltage direct current to theDC/DC module, and then trigger the third switch module to connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and trigger, when receiving the signal for disconnecting thechannel for inputting the third high voltage direct current to the DC/DCmodule, and the signal for connecting the channel for inputting thesecond high voltage direct current to the DC/DC module, the third switchmodule to disconnect the channel for inputting the third high voltagedirect current to the DC/DC module, and then trigger the third switchmodule to connect the channel for inputting the second high voltagedirect current to the DC/DC module; and

the third switch module, connected between two high voltage directcurrents and the DC/DC module, where the two high voltage directcurrents are the second high voltage direct current and the third highvoltage direct current, and configured to respond to driving of thethird driver module, disconnect the channel for inputting the secondhigh voltage direct current to the DC/DC module, and then connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and respond to driving of the third driver module, disconnectthe channel for inputting the third high voltage direct current to theDC/DC module, and then connect the channel for inputting the second highvoltage direct current to the DC/DC module.

In the power supply system, the X AC/DC modules are disposed in a powercabinet.

An embodiment of the present invention further provides an ICTequipment, including N power modules and M loads, where:

the power module is configured to adjust at least one input voltage andoutput the at least one input voltage to a load to supply power to theload, where the N power modules supply power to the M loads, and thepower module includes a rectifier module, a selecting module, and aDC/DC module, where:

the rectifier module is configured to rectify an input secondalternating current, and convert the second alternating current into asecond high voltage direct current for outputting;

the selecting module is connected to channels for inputting two highvoltage direct currents to the DC/DC module, where the two high voltagedirect currents include the second high voltage direct current and athird high voltage direct current;

the selecting module is configured to: when it is detected that thesecond high voltage direct current is normal, connect a channel forinputting the second high voltage direct current to the DC/DC module anddisconnect a channel for inputting the third high voltage direct currentto the DC/DC module; when it is detected that the second high voltagedirect current is abnormal, connect the channel for inputting the thirdhigh voltage direct current to the DC/DC module and disconnect thechannel for inputting the second high voltage direct current to theDC/DC module; and

the DC/DC module is configured to convert the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current, and output the low voltage direct current to theload for use;

where N and M are integers greater than 0.

In the ICT equipment, the power module further includes a first EMImodule, where

the first EMI module is configured to filter the third high voltagedirect current, and output the filtered third high voltage directcurrent to the selecting module.

In the ICT equipment, the power module further includes:

the second EMI module, configured to filter the input second alternatingcurrent, and output the filtered second alternating current to therectifier module.

In the ICT equipment, the power module further includes:

a PFC module, configured to perform power factor correction for avoltage after the second alternating current is rectified.

The ICT equipment further includes m power modules, where the m powermodules are used for redundant backup, and m is an integer greater thanzero. The ICT equipment further includes a low voltage bus, where DC/DCmodules of the N power modules and the m power modules output the lowvoltage direct current to the low voltage bus, and the M loads areconnected to the low voltage bus so that power is supplied to the Mloads.

In the ICT equipment, an overcurrent protection module is connectedbetween at least one load in the M loads and the low voltage bus, wherethe overcurrent protection module is configured to provide overcurrentprotection for the at least one load connected to the overcurrentprotection module.

In the ICT equipment, the M loads may be further divided into multipleload areas, where each load area includes at least one load, and eachload area is connected to the low voltage bus so that power is suppliedto the M loads. An overcurrent protection module is connected between atleast one load area in the multiple load areas and the low voltage bus,where the overcurrent protection module is configured to provideovercurrent protection for the at least one load area connected to theovercurrent protection module.

In the ICT equipment, in a first implementation manner, the selectingmodule includes:

a first voltage detecting module, configured to detect a voltage of thesecond high voltage direct current and that of the third high voltagedirect current, and when detecting that the voltage of the second highvoltage direct current is normal, output a disconnection signal to asecond driver module and output a connection signal to a first drivermodule; when detecting that the voltage of the second high voltagedirect current is abnormal, output a disconnection signal to the firstdriver module and output a connection signal to the second drivermodule;

the first driver module, configured to trigger, when receiving thedisconnection signal, a first switch module to disconnect the channelfor inputting the second high voltage direct current to the DC/DCmodule, and trigger, when receiving the connection signal and after thechannel for inputting the third high voltage direct current to the DC/DCmodule is disconnected, the first switch module to connect the channelfor inputting the second high voltage direct current to the DC/DCmodule;

the second driver module, configured to trigger, when receiving theconnection signal and after the channel for inputting the second highvoltage direct current to the DC/DC module is disconnected, a secondswitch module to connect the channel for inputting the third highvoltage direct current to the DC/DC module, and trigger, when receivingthe disconnection signal, the second switch module to disconnect thechannel for inputting the third high voltage direct current to the DC/DCmodule;

the first switch module, connected between the second high voltagedirect current and the DC/DC module, and configured to respond todriving of the first driver module, disconnect the channel for inputtingthe second high voltage direct current to the DC/DC module, and connectthe channel for inputting the second high voltage direct current to theDC/DC module; and

the second switch module, connected between the third high voltagedirect current and the DC/DC module, and configured to respond todriving of the second driver module, disconnect the channel forinputting the third high voltage direct current to the DC/DC module, andconnect the channel for inputting the third high voltage direct currentto the DC/DC module.

In the ICT equipment, in a second implementation manner, the selectingmodule includes:

a second voltage detecting module, configured to: detect a voltage ofthe second high voltage direct current and that of the third highvoltage direct current, and when detecting that the voltage of thesecond high voltage direct current is normal, output, to a third drivermodule, a signal for disconnecting the channel for inputting the thirdhigh voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the second high voltage directcurrent to the DC/DC module; when detecting that the voltage of thesecond high voltage direct current is abnormal, output, to the thirddriver module, a signal for disconnecting the channel for inputting thesecond high voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module;

the third driver module, configured to: trigger, when receiving thesignal for disconnecting the channel for inputting the second highvoltage direct current to the DC/DC module, and the signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module, a third switch module to disconnect thechannel for inputting the second high voltage direct current to theDC/DC module, and then trigger the third switch module to connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and trigger, when receiving the signal for disconnecting thechannel for inputting the third high voltage direct current to the DC/DCmodule, and the signal for connecting the channel for inputting thesecond high voltage direct current to the DC/DC module, the third switchmodule to disconnect the channel for inputting the third high voltagedirect current to the DC/DC module, and then trigger the third switchmodule to connect the channel for inputting the second high voltagedirect current to the DC/DC module; and

the third switch module, connected between two high voltage directcurrents and the DC/DC module, where the two high voltage directcurrents are the second high voltage direct current and the third highvoltage direct current, and configured to respond to driving of thethird driver module, disconnect the channel for inputting the secondhigh voltage direct current to the DC/DC module, and then connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and respond to driving of the third driver module, disconnectthe channel for inputting the third high voltage direct current to theDC/DC module, and then connect the channel for inputting the second highvoltage direct current to the DC/DC module.

The above technical solutions have the following advantages:

It can be seen that, in the foregoing embodiments of the presentinvention, two voltages, that is, a voltage of a second alternatingcurrent and that of the third high voltage direct current, which back upeach other, enter a power module. Because two power supply voltagesbacking up each other may be connected to the power module, morevoltages may be connected to fewer power modules, thereby saving a powersupply cost. Alternatively, because the power supply branch of thesecond alternating current does not require power backup, the powersupply branch of the third high voltage direct current uses a batterygroup for power backup. Because neither of the two power supply branchesuses a relatively expensive UPS equipment for power backup, and only thepower supply branch of the third high voltage direct current uses abattery group for power backup, the power supply cost is low.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the presentinvention or in the prior art more clearly, the following brieflyintroduces the accompanying drawings required for describing theembodiments or the prior art. It can be seen that, the accompanyingdrawings in the following description show merely some embodiments ofthe present invention, and a person of ordinary skill in the art maystill derive other drawings from these accompanying drawings withoutcreative efforts.

FIG. 1 is a schematic diagram of a power supply method of an existingdata center (or an equipment room);

FIG. 2 is a schematic flowchart of a power supply method according to anembodiment of the present invention;

FIG. 3 is a schematic flowchart of another power supply method accordingto an embodiment of the present invention;

FIG. 4 is a schematic diagram of a power supply apparatus according toan embodiment of the present invention;

FIG. 5 is a schematic diagram of a selecting module according to anembodiment of the present invention;

FIG. 6 is a schematic diagram of another selecting module according toan embodiment of the present invention;

FIG. 7 is a schematic diagram of a power supply system according to anembodiment of the present invention;

FIG. 8 is a schematic diagram of a first alternating current ATS module,a second alternating current ATS module, and a diesel generatoraccording to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a specific implementation manner of thepower supply system shown in FIG. 7;

FIG. 10 is a schematic diagram of another specific implementation mannerof the power supply system shown in FIG. 7; and

FIG. 11 is a schematic diagram of an ICT equipment according to anembodiment of the present invention.

DESCRIPTION OF EMBODIMENTS

The following clearly describes the technical solutions in theembodiments of the present invention with reference to the accompanyingdrawings in the embodiments of the present invention. It can be seenthat, the described embodiments are merely a part rather than all of theembodiments of the present invention. All other embodiments obtained bya person of ordinary skill in the art based on the embodiments of thepresent invention without creative efforts shall fall within theprotection scope of the present invention.

First Power Supply Method

Referring to FIG. 2, the present invention provides an embodiment of afirst power supply method, which is applied to a power module, where thepower module is configured to adjust at least one input voltage andoutput the at least one input voltage to a load to supply power to theload, where the power supply method includes:

rectifying an input second alternating current, and converting thesecond alternating current into a second HVDC (High Voltage DirectCurrent, high voltage direct current);

when detecting that the second high voltage direct current is abnormal,inputting an input third high voltage direct current to a DC/DC module;when detecting that the second high voltage direct current is normal,inputting the second high voltage direct current to the DC/DC module,where the input third high voltage direct current is in a standby stateat this time; and

converting, by the DC/DC module, the input second high voltage directcurrent or the third high voltage direct current into a low voltagedirect current, and outputting the low voltage direct current to theload for use.

It can be seen that, in the foregoing embodiment of the power supplymethod of the present invention, two voltages, that is, a voltage of asecond alternating current and that of the third high voltage directcurrent, which back up each other, enter a power module. Because twopower supply voltages backing up each other may be connected to thepower module, more voltages may be connected to fewer power modules,thereby saving a power supply cost. Further, because fewer power modulesare used, a size of an equipment containing the power modules may alsobe reduced.

In the foregoing embodiment of the power supply method of the presentinvention, before rectifying the input second alternating current, thepower supply method may further include:

filtering the input second alternating current.

Before inputting the input third high voltage direct current to theDC/DC module, the power supply method further includes:

filtering the input third high voltage direct current.

After rectifying the input second alternating current and beforeinputting the second alternating current to the DC/DC module, the powersupply method further includes:

performing power factor correction for a voltage after the secondalternating current is rectified.

In the foregoing embodiment of the power supply method of the presentinvention, the first alternating current or the second alternatingcurrent may have different voltage specifications such as a 3-phase 380V voltage, or a 3-phase 480 V voltage, or a single-phase 220 V voltage,or a single-phase 120 V voltage.

If power factor correction is performed for the second alternatingcurrent, when the second alternating current is 220 V, a normal range ofa voltage of the second high voltage direct current is 350-450 V; whenthe second alternating current is 110 V, the normal range of the voltageof the second high voltage direct current is 130-250 V.

If power factor correction is not performed for the second alternatingcurrent, when the second alternating current is 220 V, the normal rangeof the voltage of the second high voltage direct current is 240-390 V;when the second alternating current is 110 V, the normal range of thevoltage of the second high voltage direct current is 110-190 V.

In addition, according to load requirements, or according to bearingcapabilities of hardware in a power supply system, the normal range ofthe voltage of the second high voltage direct current and that of thethird high voltage direct current may be adjusted.

That the second high voltage direct current is normal means that thevoltage of the second high voltage direct current is within the normalrange.

That the second high voltage direct current is abnormal means that thevoltage of the second high voltage direct current is beyond the normalrange. In this case, overvoltage occurs in the second alternatingcurrent, or undervoltage occurs in the second alternating current, orthe voltage of the second alternating current is lost (no voltageexists), or a frequency of the second alternating current is abnormal,or wave form distortion occurs in the second alternating current.

A normal range of a voltage of a first high voltage direct current is260-400 V. That the first high voltage direct current is normal meansthat the voltage of the first high voltage direct current is within thenormal range. That the first high voltage direct current is abnormalmeans that the voltage of the first high voltage direct current isbeyond the normal range.

The normal range of the voltage of the third high voltage direct currentis 260-400 V. That the third high voltage direct current is normal meansthat the voltage of the third high voltage direct current is within thenormal range. That the third high voltage direct current is abnormalmeans that the voltage of the third high voltage direct current isbeyond the normal range.

Second Power Supply Method

Referring to FIG. 3, the present invention provides an embodiment of asecond power supply method, including:

converting an input first alternating current into a first high voltagedirect current;

outputting, by a battery group, a standby high voltage direct currentwhen the first high voltage direct current is abnormal, where a thirdhigh voltage direct current is output after the battery group and thefirst high voltage direct current are connected in parallel;

rectifying an input second alternating current, and converting thesecond alternating current into a second high voltage direct current;

when detecting that the second high voltage direct current is normal,inputting the second high voltage direct current to a DC/DC module,where the third high voltage direct current that is output after thebattery group and the first high voltage direct current are connected inparallel is in a standby state at this time; and when detecting that thesecond high voltage direct current is abnormal, inputting the third highvoltage direct current to the DC/DC module; and

converting, by the DC/DC module, the input second high voltage directcurrent or the third high voltage direct current into a low voltagedirect current, and outputting the low voltage direct current to a loadfor use.

It can be seen that, in the foregoing embodiment of the power supplymethod of the present invention, two power supply branches exist. One isa power supply branch A that uses the first alternating current as aninput, and the other is a power supply branch B that uses the secondalternating current as an input.

In the embodiment of the present invention, the power supply branch Bsupplies power when the second alternating current is normal, and thepower supply branch A supplies power when the second alternating currentis abnormal. In the power supply branch A, the first alternating currentsupplies power when the first alternating current is normal, and abattery group supplies power when the first alternating current isabnormal. That the first alternating current is abnormal means that:overvoltage occurs in the first alternating current, or undervoltageoccurs in the first alternating current, or a voltage of the firstalternating current is lost (no voltage exists), or a frequency of thefirst alternating current is abnormal, or wave form distortion occurs inthe first alternating current. That the first alternating current isnormal means that the first alternating current is in a state other thanthe abnormal state. That the second alternating current is abnormalmeans that: overvoltage occurs in the second alternating current, orundervoltage occurs in the second alternating current, or a voltage ofthe second alternating current is lost (no voltage exists), or afrequency of the second alternating current is abnormal, or wave formdistortion occurs in the second alternating current. That the secondalternating current is normal means that the second alternating currentis in a state other than the abnormal state.

In the foregoing embodiment of the power supply method, because thepower supply branch of the second alternating current does not requirepower backup, the power supply branch of the third high voltage directcurrent uses a battery group for power backup. Because neither of thetwo power supply branches uses a relatively expensive UPS equipment forpower backup, and only the power supply branch of the third high voltagedirect current uses a battery group for power backup, a power supplycost is low. Furthermore, when the second alternating current is normal,the second alternating current supplies power. In this case, only a fewpower conversion steps exist, and power supply and distributionefficiency is improved.

In addition, because the AC/DC module and the battery group areconnected in parallel, after the battery group is discharged, when thefirst alternating current and the second alternating current arerestored to normal, the second alternating current supplies power to theload. The first high voltage direct current output after the firstalternating current passes through the AC/DC module charges the batterygroup, and the battery group enters a float charging state after beingfully charged.

In the foregoing embodiment of the power supply method of the presentinvention, before rectifying the input second alternating current, thepower supply method may further include:

filtering the input second alternating current.

Before inputting the third high voltage direct current to the DC/DCmodule, the power supply method may further include:

filtering the third high voltage direct current.

After rectifying the input second alternating current and beforeinputting the second alternating current to the DC/DC module, the powersupply method may further include:

performing power factor correction for a voltage after the secondalternating current is rectified.

In the foregoing embodiment of the power supply method of the presentinvention, the first alternating current or the second alternatingcurrent may have different voltage specifications such as a 3-phase 380V voltage, or a 3-phase 480 V voltage, or a single-phase 220 V voltage,or a single-phase 120 V voltage.

If power factor correction is performed for the second alternatingcurrent, when the second alternating current is 220 V, a normal range ofa voltage of the second high voltage direct current is 350-450 V; whenthe second alternating current is 110 V, the normal range of the voltageof the second high voltage direct current is 130-250 V.

If power factor correction is not performed for the second alternatingcurrent, when the second alternating current is 220 V, the normal rangeof the voltage of the second high voltage direct current is 240-390 V;when the second alternating current is 110 V, the normal range of thevoltage of the second high voltage direct current is 110-190 V.

In addition, according to load requirements, or according to bearingcapabilities of hardware in a power supply system, the normal range ofthe voltage of the second high voltage direct current and that of thethird high voltage direct current may be adjusted.

That the second high voltage direct current is normal means that thevoltage of the second high voltage direct current is within the normalrange.

That the second high voltage direct current is abnormal means that thevoltage of the second high voltage direct current is beyond the normalrange. In this case, overvoltage occurs in the second alternatingcurrent, or undervoltage occurs in the second alternating current, orthe voltage of the second alternating current is lost (no voltageexists), or the frequency of the second alternating current is abnormal,or wave form distortion occurs in the second alternating current.

A normal range of a voltage of a first high voltage direct current is260-400 V. That the first high voltage direct current is normal meansthat the voltage of the first high voltage direct current is within thenormal range. That the first high voltage direct current is abnormalmeans that the voltage of the first high voltage direct current isbeyond the normal range.

The normal range of the voltage of the third high voltage direct currentis 260-400 V. That the third high voltage direct current is normal meansthat the voltage of the third high voltage direct current is within thenormal range. That the third high voltage direct current is abnormalmeans that the voltage of the third high voltage direct current isbeyond the normal range.

In the foregoing embodiment of the power supply method of the presentinvention, a mains supply may be converted into the first alternatingcurrent and the second alternating current in the following two manners:

First Manner:

In the foregoing embodiment of the power supply method of the presentinvention, two mains supplies are input, where the two mains suppliesinclude a first mains supply A and a second mains supply B.

When the first mains supply A is normal, the first mains supply A isdivided into two branches for outputting, where one branch is the firstalternating current and the other branch is the second alternatingcurrent.

When the first mains supply A is abnormal, and the second mains supply Bis normal, the second mains supply B is divided into two branches foroutputting, where one branch is the first alternating current and theother branch is the second alternating current.

When both the first mains supply A and the second mains supply B areabnormal, a diesel generator generates power and generates analternating current. The alternating current generated by the dieselgenerator is divided into two branches for outputting, where one branchis the first alternating current, and the other branch is the secondalternating current.

That the first mains supply A is abnormal means that: overvoltage occursin the first mains supply A, or undervoltage occurs in the first mainssupply A, or a voltage of the first mains supply A is lost (no voltageexists), or a frequency of the first mains supply A is abnormal, or waveform distortion occurs in the first mains supply A. That the first mainssupply A is normal means that the first mains supply A is in a stateother than the abnormal state.

That the second mains supply B is abnormal means that: overvoltageoccurs in the second mains supply B, or undervoltage occurs in thesecond mains supply B, or a voltage of the second mains supply B is lost(no voltage exists), or a frequency of the second mains supply B isabnormal, or wave form distortion occurs in the second mains supply B.That the second mains supply B is normal means that the second mainssupply B is in a state other than the abnormal state.

Second Manner:

In the foregoing embodiment of the power supply method of the presentinvention, a mains supply is input. When the mains supply is normal, themains supply is divided into two branches for outputting, where onebranch is the first alternating current, and the other branch is thesecond alternating current. When the mains supply is abnormal, thealternating current generated by the diesel generator through powergeneration is divided into two branches for outputting, where one branchis the first alternating current, and the other branch is the secondalternating current.

That the mains supply is abnormal means that: overvoltage occurs in themains supply, or undervoltage occurs in the mains supply, or a voltageof the mains supply is lost (no voltage exists), or a frequency of themains supply is abnormal, or wave form distortion occurs in the mainssupply. That the mains supply is normal means that the mains supply isin a state other than the abnormal state.

Power Module

Referring to FIG. 4, the present invention provides an embodiment of apower module. The power module includes a rectifier module, a selectingmodule, and a DC/DC module, where: the rectifier module is configured torectify an input second alternating current (second AC), and convert thesecond alternating current into a second high voltage direct current(second AC) for outputting;

the selecting module is connected to channels for inputting two highvoltage direct currents to the DC/DC module, where the two high voltagedirect currents include the second high voltage direct current and athird high voltage direct current (third HVDC);

the selecting module is configured to: when it is detected that thesecond high voltage direct current is normal, connect a channel forinputting the second high voltage direct current to the DC/DC module anddisconnect a channel for inputting the third high voltage direct currentto the DC/DC module; when it is detected that the second high voltagedirect current is abnormal, connect the channel for inputting the thirdhigh voltage direct current to the DC/DC module and disconnect thechannel for inputting the second high voltage direct current to theDC/DC module; and

the DC/DC module is configured to convert the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current, and output the low voltage direct current to aload for use.

It can be seen that, in the foregoing embodiment of the power module ofthe present invention, two voltages, that is, a voltage of a secondalternating current and that of the third high voltage direct current,which back up each other, enter a power module. Because two power supplyvoltages backing up each other may be connected to the power module,more voltages may be connected to fewer power modules, thereby saving apower supply cost. Further, because fewer power modules are used, a sizeof an equipment containing the power modules may also be reduced.

Further, in the power module, although there are two branches, where onebranch is a branch of the second alternating current, and the otherbranch is a branch of the third high voltage direct current, only oneDC/DC module may be disposed to further save the cost.

Further, referring to FIG. 4, in the foregoing embodiment of the powermodule of the present invention, the power module may further include afirst EMI module, where

the first EMI module is configured to filter the third high voltagedirect current, and output the filtered third high voltage directcurrent to the selecting module.

Further, the power module may further include:

the second EMI module, configured to filter the input second alternatingcurrent (second AC), and output the filtered second alternating currentto the rectifier module.

Further, the power module may further include:

a PFC module, configured to perform power factor correction for avoltage after the second alternating current is rectified.

In the foregoing embodiment of the power module of the presentinvention, the first EMI module is further configured for lightningprotection, and the second EMI module is further configured forlightning protection.

In the foregoing embodiment of the power module of the presentinvention, the first alternating current or the second alternatingcurrent may have different voltage specifications such as a 3-phase 380V voltage, or a 3-phase 480 V voltage, or a single-phase 220 V voltage,or a single-phase 120 V voltage.

If power factor correction is performed for the second alternatingcurrent, when the second alternating current is 220 V, a normal range ofa voltage of the second high voltage direct current is 350-450 V; whenthe second alternating current is 110 V, the normal range of the voltageof the second high voltage direct current is 130-250 V.

If power factor correction is not performed for the second alternatingcurrent, when the second alternating current is 220 V, the normal rangeof the voltage of the second high voltage direct current is 240-390 V;when the second alternating current is 110 V, the normal range of thevoltage of the second high voltage direct current is 110-190 V.

In addition, according to load requirements, or according to bearingcapabilities of the power module and hardware in a power supply systemin which the power module is located, the normal range of the voltage ofthe second high voltage direct current and that of the third highvoltage direct current may be adjusted.

That the second high voltage direct current is normal means that thevoltage of the second high voltage direct current is within the normalrange.

That the second high voltage direct current is abnormal means that thevoltage of the second high voltage direct current is beyond the normalrange. In this case, overvoltage occurs in the second alternatingcurrent, or undervoltage occurs in the second alternating current, orthe voltage of the second alternating current is lost (no voltageexists), or a frequency of the second alternating current is abnormal,or wave form distortion occurs in the second alternating current.

A normal range of a voltage of a first high voltage direct current is260-400 V. That the first high voltage direct current is normal meansthat the voltage of the first high voltage direct current is within thenormal range. That the first high voltage direct current is abnormalmeans that the voltage of the first high voltage direct current isbeyond the normal range.

The normal range of the voltage of the third high voltage direct currentis 260-400 V. That the third high voltage direct current is normal meansthat the voltage of the third high voltage direct current is within thenormal range. That the third high voltage direct current is abnormalmeans that the voltage of the third high voltage direct current isbeyond the normal range.

In the power module of the present invention, an implementation mannerof a selecting module in a subsequent embodiment of a power supplyapparatus may be used for the selecting module.

Power Supply Apparatus

Further, referring to FIG. 4, the present invention provides anembodiment of a power supply apparatus. The power supply apparatusincludes an AC/DC module, a battery group, a rectifier module, aselecting module, and a DC/DC module, where:

the AC/DC module is configured to convert an input first alternatingcurrent (first AC) into a first high voltage direct current (first HVDC)for outputting;

the battery group is configured to output a standby high voltage directcurrent when the first high voltage direct current output by the AC/DCmodule is abnormal,

where a third high voltage direct current (third HVDC) is output afterthe battery group and the AC/DC module are connected in parallel;

the rectifier module is configured to rectify an input secondalternating current, and convert the second alternating current into asecond high voltage direct current (second HVDC) for outputting;

the selecting module is connected to channels for inputting two highvoltage direct currents to the DC/DC module, where the two high voltagedirect currents include the second high voltage direct current and thethird high voltage direct current;

the selecting module is configured to: when it is detected that thesecond high voltage direct current is normal, connect a channel forinputting the second high voltage direct current to the DC/DC module anddisconnect a channel for inputting the third high voltage direct currentto the DC/DC module; when it is detected that the second high voltagedirect current is abnormal, connect the channel for inputting the thirdhigh voltage direct current to the DC/DC module and disconnect thechannel for inputting the second high voltage direct current to theDC/DC module; and

the DC/DC module is configured to convert the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current, and output the low voltage direct current to aload for use.

In the foregoing embodiment of the power supply apparatus, because thepower supply branch of the second alternating current does not requirepower backup, the power supply branch of the third high voltage directcurrent uses a battery group for power backup. Because neither of thetwo power supply branches uses a relatively expensive UPS equipment forpower backup, and only the power supply branch of the third high voltagedirect current uses a battery group for power backup, a power supplycost is low. Furthermore, when the second alternating current is normal,the second alternating current supplies power. In this case, only a fewpower conversion steps exist, and power supply and distributionefficiency is improved.

The foregoing embodiment of the power supply apparatus of the presentinvention may be applied to a data center or an equipment room.Furthermore, if load power of the data center or the equipment room ishigh, multiple power supply apparatuses may be disposed to supply powerto the load.

In the foregoing embodiment of the power supply apparatus of the presentinvention, two power supply branches exist. One is a power supply branchA that uses the first alternating current as an input, and the other isa power supply branch B that uses the second alternating current as aninput.

In the embodiment of the present invention, the power supply branch Bsupplies power when the second alternating current is normal, and thepower supply branch A supplies power when the second alternating currentis abnormal. In the power supply branch A, the first alternating currentsupplies power when the first alternating current is normal, and abattery group supplies power when the first alternating current isabnormal. That the first alternating current is abnormal means that:overvoltage occurs in the first alternating current, or undervoltageoccurs in the first alternating current, or a voltage of the firstalternating current is lost (no voltage exists), or a frequency of thefirst alternating current is abnormal, or wave form distortion occurs inthe first alternating current. That the first alternating current isnormal means that the first alternating current is in a state other thanthe abnormal state. That the second alternating current is abnormalmeans that: overvoltage occurs in the second alternating current, orundervoltage occurs in the second alternating current, or a voltage ofthe second alternating current is lost (no voltage exists), or afrequency of the second alternating current is abnormal, or wave formdistortion occurs in the second alternating current. That the secondalternating current is normal means that the second alternating currentis in a state other than the abnormal state.

In addition, because the AC/DC module and the battery group areconnected in parallel, after the battery group is discharged, when thefirst alternating current and the second alternating current arerestored to normal, the second alternating current supplies power to theload. The first high voltage direct current output after the firstalternating current passes through the AC/DC module charges the batterygroup, and the battery group enters a float charging state after beingfully charged.

In the foregoing embodiment of the power supply apparatus of the presentinvention, the first alternating current or the second alternatingcurrent may have different voltage specifications such as a 3-phase 380V voltage, or a 3-phase 480 V voltage, or a single-phase 220 V voltage,or a single-phase 120 V voltage.

If power factor correction is performed for the second alternatingcurrent, when the second alternating current is 220 V, a normal range ofa voltage of the second high voltage direct current is 350-450 V; whenthe second alternating current is 110 V, the normal range of the voltageof the second high voltage direct current is 130-250 V.

If power factor correction is not performed for the second alternatingcurrent, when the second alternating current is 220 V, the normal rangeof the voltage of the second high voltage direct current is 240-390 V;when the second alternating current is 110 V, the normal range of thevoltage of the second high voltage direct current is 110-190 V.

In addition, according to load requirements, or according to bearingcapabilities of the power supply apparatus and hardware in a powersupply system in which the power supply apparatus is located, the normalrange of the voltage of the second high voltage direct current and thatof the third high voltage direct current may be adjusted.

That the second high voltage direct current is normal means that thevoltage of the second high voltage direct current is within the normalrange.

That the second high voltage direct current is abnormal means that thevoltage of the second high voltage direct current is beyond the normalrange. In this case, overvoltage occurs in the second alternatingcurrent, or undervoltage occurs in the second alternating current, orthe voltage of the second alternating current is lost (no voltageexists), or the frequency of the second alternating current is abnormal,or wave form distortion occurs in the second alternating current.

A normal range of a voltage of the first high voltage direct current is260-400 V. That the first high voltage direct current is normal meansthat the voltage of the first high voltage direct current is within thenormal range. That the first high voltage direct current is abnormalmeans that the voltage of the first high voltage direct current isbeyond the normal range.

The normal range of the voltage of the third high voltage direct currentis 260-400 V. That the third high voltage direct current is normal meansthat the voltage of the third high voltage direct current is within thenormal range. That the third high voltage direct current is abnormalmeans that the voltage of the third high voltage direct current isbeyond the normal range.

Further, referring to FIG. 4, in the foregoing embodiment of the powersupply apparatus of the present invention, a first EMI module and asecond EMI module are further included, where:

the first EMI module is configured to filter the third high voltagedirect current, and output the filtered third high voltage directcurrent to the selecting module; and

the second EMI module is configured to filter the input secondalternating current (second AC), and output the filtered secondalternating current to the rectifier module.

Further, the power supply apparatus may further include:

a PFC module, configured to perform power factor correction for avoltage after the second alternating current is rectified.

In the foregoing embodiment of the power supply apparatus of the presentinvention, the first EMI module is further configured for lightningprotection, and the second EMI module is further configured forlightning protection.

In the foregoing embodiment of the power supply apparatus of the presentinvention, the selecting module may be implemented in two manners, wherethe first implementation manner is as follows:

Referring to FIG. 5, the selecting module includes:

a first voltage detecting module, configured to detect the voltage ofthe second high voltage direct current and that of the third highvoltage direct current, and when detecting that the voltage of thesecond high voltage direct current is normal, output a disconnectionsignal to a second driver module and output a connection signal to afirst driver module; when detecting that the voltage of the second highvoltage direct current is abnormal, output a disconnection signal to thefirst driver module and output a connection signal to the second drivermodule;

the first driver module, configured to trigger, when receiving thedisconnection signal, a first switch module to disconnect a channel forinputting the second high voltage direct current to the DC/DC module,and trigger, when receiving the connection signal and after the channelfor inputting the third high voltage direct current to the DC/DC moduleis disconnected, the first switch module to connect the channel forinputting the second high voltage direct current to the DC/DC module;

the second driver module, configured to trigger, when receiving theconnection signal and after the channel for inputting the second highvoltage direct current to the DC/DC module is disconnected, a secondswitch module to connect the channel for inputting the third highvoltage direct current to the DC/DC module, and trigger, when receivingthe disconnection signal, the second switch module to disconnect thechannel for inputting the third high voltage direct current to the DC/DCmodule;

the first switch module, connected between the second high voltagedirect current and the DC/DC module, and configured to respond todriving of the first driver module, disconnect the channel for inputtingthe second high voltage direct current to the DC/DC module, and connectthe channel for inputting the second high voltage direct current to theDC/DC module; and

the second switch module, connected between the third high voltagedirect current and the DC/DC module, and configured to respond todriving of the second driver module, disconnect the channel forinputting the third high voltage direct current to the DC/DC module, andconnect the channel for inputting the third high voltage direct currentto the DC/DC module.

The first switch module and the second switch module may be implementedby using a MOSFET or by using a relay.

The connecting the channel for inputting the second high voltage directcurrent to the DC/DC module includes: simultaneously connecting achannel between an anode of the second high voltage direct current andan anode of an input end of the DC/DC module, and a channel between acathode of the second high voltage direct current and a cathode of theinput end of the DC/DC module. The disconnecting the channel forinputting the second high voltage direct current to the DC/DC moduleincludes: simultaneously disconnecting the channel between the anode ofthe second high voltage direct current and the anode of the input end ofthe DC/DC module, and the channel between the cathode of the second highvoltage direct current and the cathode of the input end of the DC/DCmodule.

The connecting the channel for inputting the third high voltage directcurrent to the DC/DC module includes: simultaneously connecting achannel between an anode of the third high voltage direct current andthe anode of the input end of the DC/DC module, and a channel between acathode of the third high voltage direct current and the cathode of theinput end of the DC/DC module. The disconnecting the channel forinputting the third high voltage direct current to the DC/DC moduleincludes: simultaneously disconnecting the channel between the anode ofthe third high voltage direct current and the anode of the input end ofthe DC/DC module, and the channel between the cathode of the third highvoltage direct current and the cathode of the input end of the DC/DCmodule.

The second implementation manner is as follows:

Referring to FIG. 6, the selecting module includes:

a second voltage detecting module, configured to: detect the voltage ofthe second high voltage direct current and that of the third highvoltage direct current, and when detecting that the voltage of thesecond high voltage direct current is normal, output, to a third drivermodule, a signal for disconnecting the channel for inputting the thirdhigh voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the second high voltage directcurrent to the DC/DC module; when detecting that the voltage of thesecond high voltage direct current is abnormal, output, to the thirddriver module, a signal for disconnecting the channel for inputting thesecond high voltage direct current to the DC/DC module, and a signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module;

the third driver module, configured to: trigger, when receiving thesignal for disconnecting the channel for inputting the second highvoltage direct current to the DC/DC module, and the signal forconnecting the channel for inputting the third high voltage directcurrent to the DC/DC module, a third switch module to disconnect thechannel for inputting the second high voltage direct current to theDC/DC module, and then trigger the third switch module to connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and trigger, when receiving the signal for disconnecting thechannel for inputting the third high voltage direct current to the DC/DCmodule, and the signal for connecting the channel for inputting thesecond high voltage direct current to the DC/DC module, the third switchmodule to disconnect the channel for inputting the third high voltagedirect current to the DC/DC module, and then trigger the third switchmodule to connect the channel for inputting the second high voltagedirect current to the DC/DC module; and

the third switch module, connected between two high voltage directcurrents and the DC/DC module, where the two high voltage directcurrents are the second high voltage direct current and the third highvoltage direct current, and configured to respond to driving of thethird driver module, disconnect the channel for inputting the secondhigh voltage direct current to the DC/DC module, and then connect thechannel for inputting the third high voltage direct current to the DC/DCmodule; and respond to driving of the third driver module, disconnectthe channel for inputting the third high voltage direct current to theDC/DC module, and then connect the channel for inputting the second highvoltage direct current to the DC/DC module.

The third switch module may be implemented by using a MOSFET or by usinga relay.

The connecting the channel for inputting the second high voltage directcurrent to the DC/DC module includes: simultaneously connecting achannel between an anode of the second high voltage direct current andan anode of an input end of the DC/DC module, and a channel between acathode of the second high voltage direct current and a cathode of theinput end of the DC/DC module. The disconnecting the channel forinputting the second high voltage direct current to the DC/DC moduleincludes: simultaneously disconnecting the channel between the anode ofthe second high voltage direct current and the anode of the input end ofthe DC/DC module, and the channel between the cathode of the second highvoltage direct current and the cathode of the input end of the DC/DCmodule.

The connecting the channel for inputting the third high voltage directcurrent to the DC/DC module includes: simultaneously connecting achannel between an anode of the third high voltage direct current andthe anode of the input end of the DC/DC module, and a channel between acathode of the third high voltage direct current and the cathode of theinput end of the DC/DC module. The disconnecting the channel forinputting the third high voltage direct current to the DC/DC moduleincludes: simultaneously disconnecting the channel between the anode ofthe third high voltage direct current and the anode of the input end ofthe DC/DC module, and the channel between the cathode of the third highvoltage direct current and the cathode of the input end of the DC/DCmodule.

Power Supply System

Referring to FIG. 7, an embodiment of the present invention furtherprovides a power supply system, including X AC/DC modules, W powermodules, a power supply bus, and a battery group, where:

the power module is configured to adjust at least one input voltage andoutput the at least one input voltage to a load to supply power to theload, where the power module includes a rectifier module, a selectingmodule, and a DC/DC module;

the AC/DC module is configured to convert an input first alternatingcurrent (first AC) into a first high voltage direct current (first HVDC)for outputting;

where X first high voltage direct currents output by the X AC/DC modulesare input to the power supply bus;

the battery group is configured to output a standby high voltage directcurrent when the first high voltage direct currents output by the XAC/DC modules are abnormal;

a third high voltage direct current (third HVDC) is output after thebattery group and the power supply bus are connected in parallel, wherethe third high voltage direct current is input to the W power modules;

the rectifier module is configured to rectify an input secondalternating current (second AC), and convert the second alternatingcurrent into a second high voltage direct current (second HVDC) foroutputting;

the selecting module is connected to channels for inputting two highvoltage direct currents to the DC/DC module, where the two high voltagedirect currents include the second high voltage direct current and thethird high voltage direct current;

the selecting module is configured to: when it is detected that thesecond high voltage direct current is normal, connect a channel forinputting the second high voltage direct current to the DC/DC module anddisconnect a channel for inputting the third high voltage direct currentto the DC/DC module; when it is detected that the second high voltagedirect current is abnormal, connect the channel for inputting the thirdhigh voltage direct current to the DC/DC module and disconnect thechannel for inputting the second high voltage direct current to theDC/DC module; and

the DC/DC module is configured to convert the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current, and output the low voltage direct current to theload for use;

where X and W are integers greater than 0.

In the foregoing embodiment of the power supply system of the presentinvention, an implementation manner of the selecting module in theforegoing embodiment of the power supply apparatus may be used for theselecting module.

In the foregoing embodiment of the power supply system of the presentinvention, two voltages, that is, a voltage of a second alternatingcurrent and that of the third high voltage direct current, which back upeach other, enter a power module. Because two power supply voltagesbacking up each other may be connected to the power module, morevoltages may be connected to fewer power modules, thereby saving a powersupply cost. Further, because fewer power modules are used, a size of anequipment containing the power modules may also be reduced.

Further, because the power supply branch of the second alternatingcurrent does not require power backup, the power supply branch of thethird high voltage direct current uses a battery group for power backup.Because neither of the two power supply branches uses a relativelyexpensive UPS equipment for power backup, and only the power supplybranch of the third high voltage direct current uses a battery group forpower backup, the power supply cost is low. Furthermore, when the secondalternating current is normal, the second alternating current suppliespower. In this case, only a few power conversion steps exist, and powersupply and distribution efficiency is improved.

In the foregoing embodiment of the power supply system of the presentinvention, the X AC/DC modules implement parallel current equalizationbetween the X AC/DC modules by using a current equalization bus.

Further, referring to FIG. 7, in the foregoing embodiment of the powersupply system of the present invention, a first EMI module and a secondEMI module are further included, where:

the first EMI module is configured to filter the third high voltagedirect current, and output the filtered third high voltage directcurrent to the selecting module; and

the second EMI module is configured to filter the input secondalternating current (second AC), and output the filtered secondalternating current to the rectifier module.

Further, the power supply system may further include:

a PFC module, configured to perform power factor correction for avoltage after the second alternating current is rectified.

In the foregoing embodiment of the power supply system of the presentinvention, the first EMI module is further configured for lightningprotection, and the second EMI module is further configured forlightning protection.

In the foregoing embodiment of the power supply system of the presentinvention, the first alternating current or the second alternatingcurrent may have different voltage specifications such as a 3-phase 380V voltage, or a 3-phase 480 V voltage, or a single-phase 220 V voltage,or a single-phase 120 V voltage.

If power factor correction is performed for the second alternatingcurrent, when the second alternating current is 220 V, a normal range ofa voltage of the second high voltage direct current is 350-450 V; whenthe second alternating current is 110 V, the normal range of the voltageof the second high voltage direct current is 130-250 V.

If power factor correction is not performed for the second alternatingcurrent, when the second alternating current is 220 V, the normal rangeof the voltage of the second high voltage direct current is 240-390 V;when the second alternating current is 110 V, the normal range of thevoltage of the second high voltage direct current is 110-190 V.

In addition, according to load requirements, or according to bearingcapabilities of the power supply apparatus and hardware in a powersupply system in which the power supply apparatus is located, the normalrange of the voltage of the second high voltage direct current and thatof the third high voltage direct current may be adjusted.

That the second high voltage direct current is normal means that thevoltage of the second high voltage direct current is within the normalrange.

That the second high voltage direct current is abnormal means that thevoltage of the second high voltage direct current is beyond the normalrange. In this case, overvoltage occurs in the second alternatingcurrent, or undervoltage occurs in the second alternating current, orthe voltage of the second alternating current is lost (no voltageexists), or a frequency of the second alternating current is abnormal,or wave form distortion occurs in the second alternating current.

A normal range of a voltage of the first high voltage direct current is260-400 V. That the first high voltage direct current is normal meansthat the voltage of the first high voltage direct current is within thenormal range. That the first high voltage direct current is abnormalmeans that the voltage of the first high voltage direct current isbeyond the normal range.

The normal range of the voltage of the third high voltage direct currentis 260-400 V. That the third high voltage direct current is normal meansthat the voltage of the third high voltage direct current is within thenormal range. That the third high voltage direct current is abnormalmeans that the voltage of the third high voltage direct current isbeyond the normal range.

In the foregoing embodiment of the present invention, each power modulesupports one alternating current (second alternating current) input andone HVDC direct current (third high voltage direct current) input. Afterthe second alternating current passes through the EMI module, therectifier module, and the PFC module in the power module, the secondhigh voltage direct current with a relatively stable voltage is output.The third high voltage direct current is input to the selecting moduleafter passing through the EMI module. The selecting module performsdetection and selection control for the second high voltage directcurrent and the third high voltage direct current. A voltage value ofthe second high voltage direct current is set in a normal range.Therefore, it is considered that the input second high voltage directcurrent is normal, and the selecting module controls the second highvoltage direct current to be input to the DC/DC module after theselecting module. When an abnormality such as an input voltage fault orundervoltage or overvoltage occurs in the second AC, the correspondingrectifier and PFC modules have no PFC output or output an abnormalvoltage due to the abnormality such as the input fault or theundervoltage or the overvoltage. In this case, the selecting moduledetects that the voltage of the second high voltage direct current isnot within the normal range, and the selecting module determines thatthe input second high voltage direct current is faulty, and therefore,disconnects the channel for inputting the second high voltage directcurrent to the lower-level DC/DC module, and controls the third highvoltage direct current to be input to the DC/DC module after theselecting module. When detecting that the voltage of the second highvoltage direct current is restored to the set normal range, theselecting module disconnects the channel for inputting the third highvoltage direct current to the lower-level DC/DC module, and inputs thesecond high voltage direct current to the lower-level DC/DC moduleagain.

In the foregoing embodiment of the power supply system of the presentinvention, two power supply branches exist. One is a power supply branchA that uses the first alternating current as an input, and the other isa power supply branch B that uses the second alternating current as aninput.

In the embodiment of the present invention, the power supply branch Bsupplies power when the second alternating current is normal, and thepower supply branch A supplies power when the second alternating currentis abnormal. In the power supply branch A, the first alternating currentsupplies power when the first alternating current is normal, and abattery group supplies power when the first alternating current isabnormal. That the first alternating current is abnormal means that:overvoltage occurs in the first alternating current, or undervoltageoccurs in the first alternating current, or a voltage of the firstalternating current is lost (no voltage exists), or a frequency of thefirst alternating current is abnormal, or wave form distortion occurs inthe first alternating current. That the first alternating current isnormal means that the first alternating current is in a state other thanthe abnormal state. That the second alternating current is abnormalmeans that: overvoltage occurs in the second alternating current, orundervoltage occurs in the second alternating current, or the voltage ofthe second alternating current is lost (no voltage exists), or thefrequency of the second alternating current is abnormal, or wave formdistortion occurs in the second alternating current. That the secondalternating current is normal means that the second alternating currentis in a state other than the abnormal state.

It can be seen that, the power supply branch A and the power supplybranch B are no longer configured with a UPS power backup system.Therefore, the cost is saved, and power supply and distributionefficiency is improved.

In addition, because the AC/DC module and the battery group areconnected in parallel, after the battery group is discharged, when thefirst alternating current is restored to normal, the first high voltagedirect current output after the first alternating current passes throughthe AC/DC module charges the battery group, and the battery group entersa float charging state after being fully charged.

In the foregoing embodiment of the power supply system of the presentinvention, the DC/DC module converts the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current for outputting, where the low voltage directcurrent may be −48 V, or +12 V, or +54 V, or −54 V, and so on.

Referring to FIG. 9 and FIG. 10, in the foregoing embodiment of thepower supply system of the present invention, the W power modules may bedistributed in different ICT equipments, where the ICT equipments may belocated in a data center or an equipment room. For example, N₀+m₀ (whereN₀ and m₀ are integers greater than 0, and m₀ is smaller than or equalto N₀) (“power supply A1” to “power supply AN₀+m₀” in the figures) powermodules in the W power modules are disposed in a first ICT equipment(ICT equipment 1 in the figures), and N₁+m₁ (where N₁ and m₁ areintegers greater than 0, and m₁ is smaller than or equal to N₁) (“powersupply A1” to “power supply AN₁+m₁” in the figures) power modules in theW power modules are disposed in a second ICT equipment (ICT equipment 2in the figures), and so on. W=N₀+m₀+N₁+m₁+ . . .

N₀ power modules can satisfy power consumption requirements (electricpower requirements) of the first ICT equipment, and the redundant m₀power modules are used for redundant backup. Similarly, in the secondICT equipment, N₁ power modules can satisfy power consumptionrequirements (electric power requirements) of the second ICT equipment,and the redundant m₁ power modules are used for redundant backup.

Referring to FIG. 11, the W power modules may also be distributed in asame ICT equipment. For example, N+m (where N and m are integers greaterthan 0 and m is smaller than or equal to N) (“power supply A1” to “powersupply AN+m” in the figure) power modules in the W power modules aredistributed in the first ICT equipment, where W=N+m.

N power modules can satisfy power consumption requirements (electricpower requirements) of an ICT equipment, and the redundant m powermodules are used for redundant backup.

The ICT equipment may include but is not limited to a router, or aswitch, or a server, and so on.

Referring to FIG. 9, FIG. 10, and FIG. 11, in the foregoing embodimentof the power supply system of the present invention, the ICT equipmentmay further include a low voltage bus. DC/DC modules of N0+m0 or N1+m1or N+m power modules located in an ICT equipment output a low voltagedirect current to the low voltage bus. Loads such as a board and a fanin the ICT equipment are connected to the low voltage bus so that poweris supplied to the loads such as the board and the fan. An overcurrentprotection module may be connected between at least one load and the lowvoltage bus, where the overcurrent protection module is configured toprovide overcurrent protection for the at least one load connected tothe overcurrent protection module. The overcurrent protection module mayinclude a fuse, or a circuit breaker, and so on.

The ICT equipment may further include a current equalization bus. TheN₀+m₀ or N₁+m₁ or N+m power modules located in an ICT equipmentimplement current equalization between the N₀+m₀ or N₁+m₁ or N+m powermodules by using the current equalization bus, thereby ensuring evenload sharing.

X, W, N₀, N₁, m₀, and m₁ are integers greater than 0.

Referring to FIG. 9, FIG. 10, and FIG. 11, the loads in the ICTequipments (for example, the ICT equipment 1 and the ICT equipment 2 inthe figures) may be further divided into areas, for example, in thefigures, a load area 1 to a load area T in the ICT equipment 1, and aload area 1 to a load area L in the ICT equipment 2. M and L areintegers greater than 0. Each load area is connected to the low voltagebus so that power is supplied to the load area.

The load area includes at least one load, where the at least one loadincludes at least one electronic equipment, where the electronicequipment may be a board, or a fan, and so on.

An overcurrent protection module is connected between at least one loadarea in the multiple load areas and the low voltage bus, where theovercurrent protection module is configured to provide overcurrentprotection for the at least one load area connected to the overcurrentprotection module. The overcurrent protection module may include a fuse,or a circuit breaker, and so on.

Referring to FIG. 9 and FIG. 10, in the foregoing embodiment of thepower supply system of the present invention, the X AC/DC modules may bedisposed in a power cabinet.

In the foregoing embodiment of the power supply system of the presentinvention, a distribution module may be further included. The third highvoltage direct current (third HVDC) may be output to the first EMImodules of the W power modules by using the distribution module.

The distribution module is configured to distribute the third highvoltage direct current as W direct current branches of differentcapacities or a same capacity for outputting, where the W direct currentbranches are respectively input to the W power modules.

Referring to FIG. 9 and FIG. 10, the distribution module may be a firstdirect current distribution panel (the direct current distribution panelin the figures). The first direct current distribution panel may furtherprovide overcurrent protection for the output direct current branches.In addition, the first direct current distribution panel may furtherhave functions such as detecting the voltage and a current of the inputthird high voltage direct current.

Alternatively, the distribution module may also include a second directcurrent distribution panel (the direct current distribution panel in thefigures) and P direct current distribution cabinets (the direct currentdistribution cabinets in the figures).

The second direct current distribution panel is configured to distributethe third high voltage direct current as Q direct current branches ofdifferent capacities or a same capacity. The Q direct current branchesare respectively input to the P direct current distribution cabinets. Inthe Q direct current branches, one or multiple direct current branchesmay be input to a direct current distribution cabinet.

The direct current distribution cabinet is configured to distribute eachinput direct current branch as direct current branches of differentcapacities or a same capacity for outputting.

The total number of the direct current branches output by the P directcurrent distribution cabinets is W. The W direct current branches arerespectively input to first EMI modules of the W power modules, where Qand P are integers greater than 0.

Further, the second direct current distribution panel may furtherprovide overcurrent protection for the output direct current branches.In addition, the second direct current distribution panel may furtherhave functions such as detecting the voltage and the current of theinput third high voltage direct current. The direct current distributioncabinet may also further provide overcurrent protection for the outputdirect current branches. In addition, the direct current distributioncabinet may further have functions such as detecting a voltage and acurrent of the input direct current branches.

Referring to FIG. 9 and FIG. 10, in the foregoing embodiment of thepower supply system of the present invention, an alternating currentdistribution cabinet is further included. The second alternating currentis input to the second EMI modules of the W power modules by using thealternating current distribution cabinet.

The alternating current distribution cabinet is configured to distributethe input second alternating current as W alternating current branchesof different capacities or a same capacity.

Further, the alternating current distribution cabinet may furtherprovide overcurrent protection for the output alternating currentbranches. In addition, the alternating current distribution cabinet mayfurther have functions such as detecting the voltage and a current ofthe input second alternating current.

In the foregoing embodiment of the power supply system of the presentinvention, a mains supply may be converted into the first alternatingcurrent and the second alternating current in the following two manners:

Referring to FIG. 8 and FIG. 9, in the first manner:

In the foregoing embodiment of the power supply system of the presentinvention, two mains supplies are input to the power supply system. Thetwo mains supplies include a first mains supply A and a second mainssupply B. The power supply system further includes a first alternatingcurrent ATS module, a second alternating current ATS module, and adiesel generator (where the first alternating current ATS module and thesecond alternating current ATS module are displayed together as“alternating current ATS module” in FIG. 9). The two mains supplies areinput to the first alternating current ATS module.

The first alternating current ATS module (ATS1 in the figure) isconfigured to: receive the first mains supply A and the second mainssupply B, output the first mains supply A to the second alternatingcurrent ATS module (ATS2 in the figure) when the first mains supply A isnormal, and output the second mains supply B to the second alternatingcurrent ATS module when the first mains supply A is abnormal and thesecond mains supply B is normal, where neither the first mains supply Anor the second mains supply B is output when both the first mains supplyA and the second mains supply B are abnormal.

The diesel generator is configured to generate power to generate analternating current and output the alternating current to the secondalternating current ATS module.

The second alternating current ATS module is configured to: when thefirst mains supply A is normal, output the first mains supply A input bythe first alternating current ATS module; when the first mains supply Ais abnormal and the second mains supply B is normal, output the secondmains supply B input by the first alternating current ATS module; whenboth the first mains supply A and the second mains supply B areabnormal, output the alternating current generated by the dieselgenerator, where the first mains supply A or the second mains supply Boutput by the second alternating current ATS module or the alternatingcurrent generated by the diesel generator is divided into two branches,where one branch is the first alternating current and the other branchis the second alternating current.

That the first mains supply A is abnormal means that: overvoltage occursin the first mains supply A, or undervoltage occurs in the first mainssupply A, or a voltage of the first mains supply A is lost (no voltageexists), or a frequency of the first mains supply A is abnormal, or waveform distortion occurs in the first mains supply A. That the first mainssupply A is normal means that the first mains supply A is in a stateother than the abnormal state.

That the second mains supply B is abnormal means that: overvoltageoccurs in the second mains supply B, or undervoltage occurs in thesecond mains supply B, or a voltage of the second mains supply B is lost(no voltage exists), or a frequency of the second mains supply B isabnormal, or wave form distortion occurs in the second mains supply B.That the second mains supply B is normal means that the second mainssupply B is in a state other than the abnormal state.

It can be seen that, in the foregoing embodiment of the presentinvention, when the first mains supply A or the second mains supply B isnormal, the mains supply is selected to supply power. The dieselgenerator is started to supply power only in a case in which both thefirst mains supply A and the second mains supply B are abnormal.However, there is a process from startup to power generation of thediesel generator. Therefore, a battery group supplies power before thediesel generator can generate power.

In the foregoing embodiment of the power supply system of the presentinvention, a first alternating current distribution panel is furtherincluded, where:

the first alternating current distribution panel is configured todistribute the first mains supply A or the second mains supply B outputby the second alternating current ATS module or the alternating currentgenerated by the diesel generator, as two alternating current branches,where one alternating current branch is the first alternating currentand the other alternating current branch is the second alternatingcurrent; and

the first alternating current distribution panel may further provideovercurrent protection for the output alternating current branches. Inaddition, the first alternating current distribution panel may furtherhave functions such as implementing lightning protection or detectionfor the first mains supply A or the second mains supply B or thealternating current generated by the diesel generator.

Second Manner:

Referring to FIG. 10, in the foregoing embodiment of the power supplysystem of the present invention, a mains supply is input to the powersupply system, and the mains supply system further includes a thirdalternating current ATS module (the alternating current ATS module inthe figure) and a diesel generator, where the mains supply is input tothe third alternating current ATS module.

The diesel generator is configured to generate power to generate analternating current and output the alternating current to the thirdalternating current ATS module.

The third alternating current ATS module is configured to: when themains supply is normal, output the input mains supply, or when the mainssupply is abnormal, output the alternating current generated by thediesel generator, where the alternating current generated by the dieselgenerator and output by the third alternating current ATS module or themains supply is divided into two branches, where one branch is the firstalternating current and the other branch is the second alternatingcurrent.

That the mains supply is abnormal means that: overvoltage occurs in themains supply, or undervoltage occurs in the mains supply, or a voltageof the mains supply is lost (no voltage exists), or a frequency of themains supply is abnormal, or wave form distortion occurs in the mainssupply. That the mains supply is normal means that the mains supply isin a state other than the abnormal state.

It can be seen that, in the foregoing embodiment of the presentinvention, when the mains supply is normal, the mains supply is selectedto supply power. The diesel generator is started to supply power only ina case in which the mains supply is abnormal. However, there is aprocess from startup to power generation of the diesel generator.Therefore, a battery group supplies power before the diesel generatorcan generate power.

In the foregoing embodiment of the power supply system of the presentinvention, a third alternating current distribution panel is furtherincluded, where:

the third alternating current distribution panel is configured todistribute the mains supply output by the third alternating current ATSmodule or the alternating current generated by the diesel generator, astwo alternating current branches, where one alternating current branchis the first alternating current and the other alternating currentbranch is the second alternating current; and

the third alternating current distribution panel may further provideovercurrent protection for the output alternating current branches. Inaddition, the third alternating current distribution panel may furtherhave functions such as implementing lightning protection or detectionfor the mains supply or the alternating current input by the dieselgenerator.

ICT Equipment

Referring to FIG. 9 and FIG. 10, an embodiment of the present inventionfurther provides an ICT equipment. The ICT equipment includes N powermodules and M loads, where:

the power module is configured to adjust at least one input voltage andoutput the at least one input voltage to a load to supply power to theload, where the N power modules supply power to the M loads, and thepower module includes a rectifier module, a selecting module, and aDC/DC module, where:

the rectifier module is configured to rectify an input secondalternating current (second AC), and convert the second alternatingcurrent into a second high voltage direct current (second HVDC) foroutputting;

the selecting module is connected to channels for inputting two highvoltage direct currents to the DC/DC module, where the two high voltagedirect currents include the second high voltage direct current (secondHVDC) and a third high voltage direct current (third HVDC);

the selecting module is configured to: when it is detected that thesecond high voltage direct current is normal, connect a channel forinputting the second high voltage direct current to the DC/DC module anddisconnect a channel for inputting the third high voltage direct currentto the DC/DC module; when it is detected that the second high voltagedirect current is abnormal, connect the channel for inputting the thirdhigh voltage direct current to the DC/DC module and disconnect thechannel for inputting the second high voltage direct current to theDC/DC module; and

the DC/DC module is configured to convert the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current, and output the low voltage direct current to theload for use;

where N and M are integers greater than 0.

In the foregoing embodiment of the ICT equipment of the presentinvention, an implementation manner of the selecting module in theforegoing embodiment of the power supply apparatus may be used for theselecting module.

In the foregoing embodiment of the ICT equipment of the presentinvention, two voltages, that is, a voltage of a second alternatingcurrent and that of the third high voltage direct current, which back upeach other, enter a power module. Because two power supply voltagesbacking up each other may be connected to the power module, morevoltages may be connected to fewer power modules, thereby saving a powersupply cost. Further, because fewer power modules are used, a size ofthe ICT equipment containing the power modules may also be reduced.

In the foregoing embodiment of the ICT equipment of the presentinvention, the X AC/DC modules may implement parallel currentequalization between the X AC/DC modules by using a current equalizationbus.

Further, referring to FIG. 7, in the foregoing embodiment of the ICTequipment of the present invention, a first EMI module and a second EMImodule are further included, where:

the first EMI module is configured to filter the third high voltagedirect current, and output the filtered third high voltage directcurrent to the selecting module; and

the second EMI module is configured to filter the input secondalternating current (second AC), and output the filtered secondalternating current to the rectifier module.

Further, the ICT equipment may further include:

a PFC module, configured to perform power factor correction for avoltage after the second alternating current is rectified.

In the foregoing embodiment of the ICT equipment of the presentinvention, the first EMI module may be further configured for lightningprotection, and the second EMI module may also be further configured forlightning protection.

In the foregoing embodiment of the ICT equipment of the presentinvention, the first alternating current or the second alternatingcurrent may have different voltage specifications such as a 3-phase 380V voltage, or a 3-phase 480 V voltage, or a single-phase 220 V voltage,or a single-phase 120 V voltage.

If power factor correction is performed for the second alternatingcurrent, when the second alternating current is 220 V, a normal range ofa voltage of the second high voltage direct current is 350-450 V; whenthe second alternating current is 110 V, the normal range of the voltageof the second high voltage direct current is 130-250 V.

If power factor correction is not performed for the second alternatingcurrent, when the second alternating current is 220 V, the normal rangeof the voltage of the second high voltage direct current is 240-390 V;when the second alternating current is 110 V, the normal range of thevoltage of the second high voltage direct current is 110-190 V.

In addition, according to load requirements, or according to bearingcapabilities of the power supply apparatus and hardware in a powersupply system or an ICT equipment in which the power supply apparatus islocated, the normal range of the voltage of the second high voltagedirect current and that of the third high voltage direct current may beadjusted.

That the second high voltage direct current is normal means that thevoltage of the second high voltage direct current is within the normalrange.

That the second high voltage direct current is abnormal means that thevoltage of the second high voltage direct current is beyond the normalrange. In this case, overvoltage occurs in the second alternatingcurrent, or undervoltage occurs in the second alternating current, orthe voltage of the second alternating current is lost (no voltageexists), or a frequency of the second alternating current is abnormal,or wave form distortion occurs in the second alternating current.

A normal range of a voltage of the first high voltage direct current is260-400 V. That the first high voltage direct current is normal meansthat the voltage of the first high voltage direct current is within thenormal range. That the first high voltage direct current is abnormalmeans that the voltage of the first high voltage direct current isbeyond the normal range.

The normal range of the voltage of the third high voltage direct currentis 260-400 V. That the third high voltage direct current is normal meansthat the voltage of the third high voltage direct current is within thenormal range. That the third high voltage direct current is abnormalmeans that the voltage of the third high voltage direct current isbeyond the normal range.

In the foregoing embodiment of the present invention, each power modulesupports one alternating current (second alternating current) input andone HVDC direct current (third high voltage direct current) input. Afterthe second alternating current passes through the EMI module, therectifier module, and the PFC module in the power module, the secondhigh voltage direct current with a relatively stable voltage is output.The third high voltage direct current is input to the selecting moduleafter passing through the EMI module. The selecting module performsdetection and selection control for the second high voltage directcurrent and the third high voltage direct current. A voltage value ofthe second high voltage direct current is set in a normal range.Therefore, it is considered that the input second high voltage directcurrent is normal, and the selecting module controls the second highvoltage direct current to be input to the DC/DC module after theselecting module. When an abnormality such as an input voltage fault orundervoltage or overvoltage occurs in the second AC, the correspondingrectifier and PFC modules have no PFC output or output an abnormalvoltage due to the abnormality such as the input fault or theundervoltage or the overvoltage. In this case, the selecting moduledetects that the voltage of the second high voltage direct current isnot within the normal range, and the selecting module determines thatthe input second high voltage direct current is faulty, and therefore,disconnects the channel for inputting the second high voltage directcurrent to the lower-level DC/DC module, and controls the third highvoltage direct current to be input to the DC/DC module after theselecting module. When detecting that the voltage of the second highvoltage direct current is restored to the set normal range, theselecting module disconnects the channel for inputting the third highvoltage direct current to the lower-level DC/DC module, and inputs thesecond high voltage direct current to the lower-level DC/DC moduleagain.

In the foregoing embodiment of the ICT equipment of the presentinvention, two power supply branches exist. One is a power supply branchA that uses the first alternating current as an input, and the other isa power supply branch B that uses the second alternating current as aninput.

In the embodiment of the present invention, the power supply branch Bsupplies power when the second alternating current is normal, and thepower supply branch A supplies power when the second alternating currentis abnormal. In the power supply branch A, the first alternating currentsupplies power when the first alternating current is normal, and abattery group supplies power when the first alternating current isabnormal. That the first alternating current is abnormal means that:overvoltage occurs in the first alternating current, or undervoltageoccurs in the first alternating current, or a voltage of the firstalternating current is lost (no voltage exists), or a frequency of thefirst alternating current is abnormal, or wave form distortion occurs inthe first alternating current. That the first alternating current isnormal means that the first alternating current is in a state other thanthe abnormal state. That the second alternating current is abnormalmeans that: overvoltage occurs in the second alternating current, orundervoltage occurs in the second alternating current, or the voltage ofthe second alternating current is lost (no voltage exists), or afrequency of the second alternating current is abnormal, or wave formdistortion occurs in the second alternating current. That the secondalternating current is normal means that the second alternating currentis in a state other than the abnormal state.

It can be seen that, the power supply branch A and the power supplybranch B are no longer configured with a UPS power backup system.Therefore, the cost is saved, and power supply and distributionefficiency is improved.

In addition, because the AC/DC module and the battery group areconnected in parallel, after the battery group is discharged, when thefirst alternating current is restored to normal, the first high voltagedirect current output after the first alternating current passes throughthe AC/DC module charges the battery group, and the battery group entersa float charging state after being fully charged.

In the foregoing embodiment of the ICT equipment of the presentinvention, the DC/DC module converts the input second high voltagedirect current or the third high voltage direct current into a lowvoltage direct current for outputting, where the low voltage directcurrent may be −48 V, or +12 V, or +54 V, or −54 V, and so on.

Referring to FIG. 9 and FIG. 10, in the foregoing embodiment of the ICTequipment of the present invention, the W power modules may bedistributed in different ICT equipments, where the ICT equipments may belocated in a data center or an equipment room. For example, N₀+m₀ (whereN₀ and m₀ are integers greater than 0, and m₀ is smaller than or equalto N₀) (“power supply A1” to “power supply AN₀+m₀” in the figures) powermodules in the W power modules are disposed in a first ICT equipment(ICT equipment 1 in the figures), and N₁+m₁ (where N₁ and m₁ areintegers greater than 0, and m₁ is smaller than or equal to N₁) (“powersupply A1” to “power supply AN₁+m₁” in the figures) power modules in theW power modules are disposed in a second ICT equipment (ICT equipment 2in the figures), and so on. W=N₀+m₀+N₁+m₁+ . . .

N₀ power modules can satisfy power consumption requirements (electricpower requirements) of the first ICT equipment, and the redundant m₀power modules are used for redundant backup. Similarly, in the secondICT equipment, N₁ power modules can satisfy power consumptionrequirements (electric power requirements) of the second ICT equipment,and the redundant m₁ power modules are used for redundant backup.

Referring to FIG. 11, the W power modules may also be distributed in asame ICT equipment. For example, N+m (where N and m are integers greaterthan 0 and m is smaller than or equal to N) (“power supply A1” to “powersupply AN+m” in the figure) power modules in the W power modules aredistributed in the first ICT equipment, where W=N+m.

N power modules can satisfy power consumption requirements (electricpower requirements) of an ICT equipment, and the redundant m powermodules are used for redundant backup, where m is an integer greaterthan 0.

In the foregoing embodiment of the ICT equipment of the presentinvention, the ICT equipment may include but is not limited to a router,or a switch, or a server, and so on.

Referring to FIG. 9, FIG. 10, and FIG. 11, in the foregoing embodimentof the ICT equipment of the present invention, the ICT equipment mayfurther include a low voltage bus. DC/DC modules of N₀+m₀ or N₁+m₁ orN+m power modules located in an ICT equipment output a low voltagedirect current to the low voltage bus. M loads in the ICT equipment areconnected to the low voltage bus so that power is supplied to the Mloads. The M loads include loads such as a board and a fan in the ICTequipment. An overcurrent protection module is connected between atleast one load in the M loads and the low voltage bus, where theovercurrent protection module is configured to provide overcurrentprotection for the at least one load connected to the overcurrentprotection module. The overcurrent protection module may include a fuse,or a circuit breaker, and so on.

The ICT equipment may further include a current equalization bus. TheN₀+m₀ or N₁+m₁ or N+m power modules located in an ICT equipmentimplement current equalization between the N₀+m₀ or N₁+m₁ or N+m powermodules by using the current equalization bus, thereby ensuring evenload sharing.

X, W, N₀, N₁, m₀, and m₁ are integers greater than 0.

Referring to FIG. 9, FIG. 10, and FIG. 11, the M loads in the ICTequipments (for example, the ICT equipment 1 and the ICT equipment 2 inthe figures) may be divided into multiple load areas, for example, inthe figures, a load area 1 to a load area T in the ICT equipment 1, anda load area 1 to a load area L in the ICT equipment 2. T and L areintegers greater than 0. Each load area is connected to the low voltagebus so that power is supplied to the load area.

The load area includes at least one load, where the at least one loadincludes at least one electronic equipment, where the electronicequipment may be a board, or a fan, and so on.

An overcurrent protection module is connected between at least one loadarea in the multiple load areas and the low voltage bus, where theovercurrent protection module is configured to provide overcurrentprotection for the at least one load area connected to the overcurrentprotection module. The overcurrent protection module may include a fuse,or a circuit breaker, and so on.

Referring to FIG. 9 and FIG. 10, in the foregoing embodiment of the ICTequipment of the present invention, the X AC/DC modules may be disposedin a power cabinet.

In the foregoing embodiment of the ICT equipment of the presentinvention, a distribution module may be further included. The third highvoltage direct current (third HVDC) may be output to the first EMImodules of the W power modules by using the distribution module.

The distribution module is configured to distribute the third highvoltage direct current as W direct current branches of differentcapacities or a same capacity for outputting, where the W direct currentbranches are respectively input to the W power modules.

Referring to FIG. 9 and FIG. 10, the distribution module may be a firstdirect current distribution panel (the direct current distribution panelin the figures). The first direct current distribution panel may furtherprovide overcurrent protection for the output direct current branches.In addition, the first direct current distribution panel may furtherhave functions such as detecting the voltage and a current of the inputthird high voltage direct current.

Alternatively, the distribution module may also include a second directcurrent distribution panel (the direct current distribution panel in thefigures) and P direct current distribution cabinets (the direct currentdistribution cabinets in the figures).

The second direct current distribution panel is configured to distributethe third high voltage direct current as Q direct current branches ofdifferent capacities or a same capacity. The Q direct current branchesare respectively input to the P direct current distribution cabinets. Inthe Q direct current branches, one or multiple direct current branchesmay be input to a direct current distribution cabinet.

The direct current distribution cabinet is configured to distribute eachinput direct current branch as direct current branches of differentcapacities or a same capacity for outputting.

The total number of the direct current branches output by the P directcurrent distribution cabinets is W. The W direct current branches arerespectively input to the first EMI modules of the W power modules,where Q and P are integers greater than 0.

Further, the second direct current distribution panel may furtherprovide overcurrent protection for the output direct current branches.In addition, the second direct current distribution panel may furtherhave functions such as detecting the voltage and the current of theinput third high voltage direct current. The direct current distributioncabinet may also further provide overcurrent protection for the outputdirect current branches. In addition, the direct current distributioncabinet may further have functions such as detecting a voltage and acurrent of the input direct current branches.

Referring to FIG. 9 and FIG. 10, in the foregoing embodiment of the ICTequipment of the present invention, an alternating current distributioncabinet is further included. The second alternating current is input tothe second EMI modules of the W power modules by using the alternatingcurrent distribution cabinet.

The alternating current distribution cabinet is configured to distributethe input second alternating current as W alternating current branchesof different capacities or a same capacity.

Further, the alternating current distribution cabinet may furtherprovide overcurrent protection for the output alternating currentbranches. In addition, the alternating current distribution cabinet mayfurther have functions such as detecting the voltage and a current ofthe input second alternating current.

A person of ordinary skill in the art may understand that, betweenmultiple embodiments of the power supply method, power module, powersupply apparatus, power supply system, and ICT equipment, mutualreference may be made for the specific steps and components.

A person of ordinary skill in the art may understand that all or a partof the processes of the methods in the embodiments may be implemented bya computer program instructing relevant hardware. The program may bestored in a computer readable storage medium. When the program runs, theprocesses of the methods in the embodiments are performed. The foregoingstorage medium may include: a magnetic disc, an optical disc, aread-only memory (Read-Only Memory, ROM), or a random access memory(Random Access Memory, RAM).

Only several embodiments of the present invention have been described,and a person skilled in the art may make various modifications orvariations to the present invention according to the disclosure of theapplication document without departing from the spirit and scope of thepresent invention.

What is claimed is:
 1. A power module, comprising a rectifier module, a selecting module, and a DC/DC (Direct Current/Direct Current) module, wherein: the rectifier module is configured to rectify an input second alternating current, and convert the second alternating current into a second high voltage direct current for outputting; the selecting module is connected to channels for inputting two high voltage direct currents to the DC/DC module, wherein the two high voltage direct currents comprise the second high voltage direct current and a third high voltage direct current; the selecting module is configured to: when it is detected that the second high voltage direct current is normal, connect a channel for inputting the second high voltage direct current to the DC/DC module and disconnect a channel for inputting the third high voltage direct current to the DC/DC module; when it is detected that the second high voltage direct current is abnormal, connect the channel for inputting the third high voltage direct current to the DC/DC module and disconnect the channel for inputting the second high voltage direct current to the DC/DC module; and the DC/DC module is configured to convert the input second high voltage direct current or the third high voltage direct current into a low voltage direct current, and output the low voltage direct current to a load for use.
 2. The power module according to claim 1, further comprising a first EMI (Electromagnetic Interference) module, wherein: the first EMI module is configured to filter the third high voltage direct current, and output the filtered third high voltage direct current to the selecting module.
 3. The power module according to claim 1, further comprising: a second EMI module, configured to filter the input second alternating current, and output the filtered second alternating current to the rectifier module.
 4. The power module according to claim 1, further comprising: a PFC (Power Factor Correction) module, configured to perform power factor correction for a voltage after the second alternating current is rectified.
 5. The power module according to claim 1, wherein the selecting module comprises: a first voltage detecting module, configured to detect a voltage of the second high voltage direct current and that of the third high voltage direct current, and when detecting that the voltage of the second high voltage direct current is normal, output a disconnection signal to a second driver module and output a connection signal to a first driver module; when detecting that the voltage of the second high voltage direct current is abnormal, output a disconnection signal to the first driver module and output a connection signal to the second driver module; the first driver module, configured to trigger, when receiving the disconnection signal, a first switch module to disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and trigger, when receiving the connection signal and after the channel for inputting the third high voltage direct current to the DC/DC module is disconnected, the first switch module to connect the channel for inputting the second high voltage direct current to the DC/DC module; the second driver module, configured to trigger, when receiving the connection signal and after the channel for inputting the second high voltage direct current to the DC/DC module is disconnected, a second switch module to connect the channel for inputting the third high voltage direct current to the DC/DC module, and trigger, when receiving the disconnection signal, the second switch module to disconnect the channel for inputting the third high voltage direct current to the DC/DC module; the first switch module, connected between the second high voltage direct current and the DC/DC module, and configured to respond to driving of the first driver module, disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and connect the channel for inputting the second high voltage direct current to the DC/DC module; and the second switch module, connected between the third high voltage direct current and the DC/DC module, and configured to respond to driving of the second driver module, disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and connect the channel for inputting the third high voltage direct current to the DC/DC module.
 6. The power module according to claim 1, wherein the selecting module comprises: a second voltage detecting module, configured to: detect a voltage of the second high voltage direct current and that of the third high voltage direct current, and when detecting that the voltage of the second high voltage direct current is normal, output, to a third driver module, a signal for disconnecting the channel for inputting the third high voltage direct current to the DC/DC module, and a signal for connecting the channel for inputting the second high voltage direct current to the DC/DC module; when detecting that the voltage of the second high voltage direct current is abnormal, output, to a third driver module, a signal for disconnecting the channel for inputting the second high voltage direct current to the DC/DC module, and a signal for connecting the channel for inputting the third high voltage direct current to the DC/DC module; the third driver module, configured to: trigger, when receiving the signal for disconnecting the channel for inputting the second high voltage direct current to the DC/DC module, and the signal for connecting the channel for inputting the third high voltage direct current to the DC/DC module, a third switch module to disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and then trigger the third switch module to connect the channel for inputting the third high voltage direct current to the DC/DC module; and trigger, when receiving the signal for disconnecting the channel for inputting the third high voltage direct current to the DC/DC module, and the signal for connecting the channel for inputting the second high voltage direct current to the DC/DC module, the third switch module to disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and then trigger the third switch module to connect the channel for inputting the second high voltage direct current to the DC/DC module; and the third switch module, connected between two high voltage direct currents and the DC/DC module, wherein the two high voltage direct currents are the second high voltage direct current and the third high voltage direct current, and configured to respond to driving of the third driver module, disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and then connect the channel for inputting the third high voltage direct current to the DC/DC module; and respond to driving of the third driver module, disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and then connect the channel for inputting the second high voltage direct current to the DC/DC module.
 7. A power supply apparatus, comprising an AC/DC (Alternating Current/Direct Current) module, a battery group, a rectifier module, a selecting module, and a DC/DC (Direct Current/Direct Current) module, wherein: the AC/DC module is configured to convert an input first alternating current into a first high voltage direct current for outputting; the battery group is configured to output a standby high voltage direct current when the first high voltage direct current output by the AC/DC module is abnormal, wherein a third high voltage direct current is output after the battery group and the AC/DC module are connected in parallel; the rectifier module is configured to rectify an input second alternating current, and convert the second alternating current into a second high voltage direct current for outputting; the selecting module is connected to channels for inputting two high voltage direct currents to the DC/DC module, wherein the two high voltage direct currents comprise the second high voltage direct current and the third high voltage direct current; the selecting module is configured to: when it is detected that the second high voltage direct current is normal, connect a channel for inputting the second high voltage direct current to the DC/DC module and disconnect a channel for inputting the third high voltage direct current to the DC/DC module; when it is detected that the second high voltage direct current is abnormal, connect the channel for inputting the third high voltage direct current to the DC/DC module and disconnect the channel for inputting the second high voltage direct current to the DC/DC module; and the DC/DC module is configured to convert the input second high voltage direct current or the third high voltage direct current into a low voltage direct current, and output the low voltage direct current to a load for use.
 8. The power supply apparatus according to claim 7, further comprising a first EMI module, wherein: the first EMI module is configured to filter the third high voltage direct current, and output the filtered third high voltage direct current to the selecting module.
 9. The power supply apparatus according to claim 7, further comprising a second EMI (Electromagnetic Interference) module, wherein: the second EMI module is configured to filter the input second alternating current, and output the filtered second alternating current to the rectifier module.
 10. The power supply apparatus according to claim 7, further comprising: a PFC (Power Factor Correction) module, configured to perform power factor correction for a voltage after the second alternating current is rectified.
 11. The power supply apparatus according to claim 7, wherein the selecting module comprises: a first voltage detecting module, configured to detect a voltage of the second high voltage direct current and that of the third high voltage direct current, and when detecting that the voltage of the second high voltage direct current is normal, output a disconnection signal to a second driver module and output a connection signal to a first driver module; when detecting that the voltage of the second high voltage direct current is abnormal, output a disconnection signal to the first driver module and output a connection signal to the second driver module; the first driver module, configured to trigger, when receiving the disconnection signal, a first switch module to disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and trigger, when receiving the connection signal and after the channel for inputting the third high voltage direct current to the DC/DC module is disconnected, the first switch module to connect the channel for inputting the second high voltage direct current to the DC/DC module; the second driver module, configured to trigger, when receiving the connection signal and after the channel for inputting the second high voltage direct current to the DC/DC module is disconnected, a second switch module to connect the channel for inputting the third high voltage direct current to the DC/DC module, and trigger, when receiving the disconnection signal, the second switch module to disconnect the channel for inputting the third high voltage direct current to the DC/DC module; the first switch module, connected between the second high voltage direct current and the DC/DC module, and configured to respond to driving of the first driver module, disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and connect the channel for inputting the second high voltage direct current to the DC/DC module; and the second switch module, connected between the third high voltage direct current and the DC/DC module, and configured to respond to driving of the second driver module, disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and connect the channel for inputting the third high voltage direct current to the DC/DC module.
 12. The power supply apparatus according to claim 7, wherein the selecting module comprises: a second voltage detecting module, configured to: detect a voltage of the second high voltage direct current and that of the third high voltage direct current, and when detecting that the voltage of the second high voltage direct current is normal, output, to a third driver module, a signal for disconnecting the channel for inputting the third high voltage direct current to the DC/DC module, and a signal for connecting the channel for inputting the second high voltage direct current to the DC/DC module; when detecting that the voltage of the second high voltage direct current is abnormal, output, to the third driver module, a signal for disconnecting the channel for inputting the second high voltage direct current to the DC/DC module, and a signal for connecting the channel for inputting the third high voltage direct current to the DC/DC module; the third driver module, configured to: trigger, when receiving the signal for disconnecting the channel for inputting the second high voltage direct current to the DC/DC module, and the signal for connecting the channel for inputting the third high voltage direct current to the DC/DC module, a third switch module to disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and then trigger the third switch module to connect the channel for inputting the third high voltage direct current to the DC/DC module; and trigger, when receiving the signal for disconnecting the channel for inputting the third high voltage direct current to the DC/DC module, and the signal for connecting the channel for inputting the second high voltage direct current to the DC/DC module, the third switch module to disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and then trigger the third switch module to connect the channel for inputting the second high voltage direct current to the DC/DC module; and the third switch module, connected between two high voltage direct currents and the DC/DC module, wherein the two high voltage direct currents are the second high voltage direct current and the third high voltage direct current, and configured to respond to driving of the third driver module, disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and then connect the channel for inputting the third high voltage direct current to the DC/DC module; and respond to driving of the third driver module, disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and then connect the channel for inputting the second high voltage direct current to the DC/DC module.
 13. A power supply system, comprising X AC/DC (Alternating Current/Direct Current) modules, W power modules, a power supply bus, and a battery group, wherein: the power module is configured to adjust at least one input voltage and output the at least one input voltage to a load to supply power to the load, wherein the power module comprises a rectifier module, a selecting module, and a DC/DC (Direct Current/Direct Current) module; the AC/DC module is configured to convert an input first alternating current into a first high voltage direct current for outputting; wherein X first high voltage direct currents output by the X AC/DC modules are input to the power supply bus; the battery group is configured to output a standby high voltage direct current when the first high voltage direct currents output by the X AC/DC modules are abnormal; a third high voltage direct current is output after the battery group and the power supply bus are connected in parallel, wherein the third high voltage direct current is input to the W power modules; the rectifier module is configured to rectify an input second alternating current, and convert the second alternating current into a second high voltage direct current for outputting; the selecting module is connected to channels for inputting two high voltage direct currents to the DC/DC module, wherein the two high voltage direct currents comprise the second high voltage direct current and the third high voltage direct current; the selecting module is configured to: when it is detected that the second high voltage direct current is normal, connect a channel for inputting the second high voltage direct current to the DC/DC module and disconnect a channel for inputting the third high voltage direct current to the DC/DC module; when it is detected that the second high voltage direct current is abnormal, connect the channel for inputting the third high voltage direct current to the DC/DC module and disconnect the channel for inputting the second high voltage direct current to the DC/DC module; and the DC/DC module is configured to convert the input second high voltage direct current or the third high voltage direct current into a low voltage direct current, and output the low voltage direct current to the load for use; wherein X and W are integers greater than
 0. 14. The power supply system according to claim 13, further comprising a first EMI (Electromagnetic Interference) module, wherein: the first EMI module is configured to filter the third high voltage direct current, and output the filtered third high voltage direct current to the selecting module.
 15. The power supply system according to claim 13, further comprising a second EMI module, wherein: the second EMI module is configured to filter the input second alternating current, and output the filtered second alternating current to the rectifier module.
 16. The power supply system according to claim 13, further comprising: a PFC (Power Factor Correction) module, configured to perform power factor correction for a voltage after the second alternating current is rectified.
 17. The power supply system according to claim 13, wherein the selecting module comprises: a first voltage detecting module, configured to detect a voltage of the second high voltage direct current and that of the third high voltage direct current, and when detecting that the voltage of the second high voltage direct current is normal, output a disconnection signal to a second driver module and output a connection signal to a first driver module; when detecting that the voltage of the second high voltage direct current is abnormal, output a disconnection signal to the first driver module and output a connection signal to the second driver module; the first driver module, configured to trigger, when receiving the disconnection signal, a first switch module to disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and trigger, when receiving the connection signal and after the channel for inputting the third high voltage direct current to the DC/DC module is disconnected, the first switch module to connect the channel for inputting the second high voltage direct current to the DC/DC module; the second driver module, configured to trigger, when receiving the connection signal and after the channel for inputting the second high voltage direct current to the DC/DC module is disconnected, a second switch module to connect the channel for inputting the third high voltage direct current to the DC/DC module, and trigger, when receiving the disconnection signal, the second switch module to disconnect the channel for inputting the third high voltage direct current to the DC/DC module; the first switch module, connected between the second high voltage direct current and the DC/DC module, and configured to respond to driving of the first driver module, disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and connect the channel for inputting the second high voltage direct current to the DC/DC module; and the second switch module, connected between the third high voltage direct current and the DC/DC module, and configured to respond to driving of the second driver module, disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and connect the channel for inputting the third high voltage direct current to the DC/DC module.
 18. The power supply system according to claim 13, wherein the selecting module comprises: a second voltage detecting module, configured to: detect a voltage of the second high voltage direct current and that of the third high voltage direct current, and when detecting that the voltage of the second high voltage direct current is normal, output, to a third driver module, a signal for disconnecting the channel for inputting the third high voltage direct current to the DC/DC module, and a signal for connecting the channel for inputting the second high voltage direct current to the DC/DC module; when detecting that the voltage of the second high voltage direct current is abnormal, output, to the third driver module, a signal for disconnecting the channel for inputting the second high voltage direct current to the DC/DC module, and a signal for connecting the channel for inputting the third high voltage direct current to the DC/DC module; the third driver module, configured to: trigger, when receiving the signal for disconnecting the channel for inputting the second high voltage direct current to the DC/DC module, and the signal for connecting the channel for inputting the third high voltage direct current to the DC/DC module, a third switch module to disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and then trigger the third switch module to connect the channel for inputting the third high voltage direct current to the DC/DC module; and trigger, when receiving the signal for disconnecting the channel for inputting the third high voltage direct current to the DC/DC module, and the signal for connecting the channel for inputting the second high voltage direct current to the DC/DC module, the third switch module to disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and then trigger the third switch module to connect the channel for inputting the second high voltage direct current to the DC/DC module; and the third switch module, connected between two high voltage direct currents and the DC/DC module, wherein the two high voltage direct currents are the second high voltage direct current and the third high voltage direct current, and configured to respond to driving of the third driver module, disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and then connect the channel for inputting the third high voltage direct current to the DC/DC module; and respond to driving of the third driver module, disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and then connect the channel for inputting the second high voltage direct current to the DC/DC module.
 19. The power supply system according to claim 13, wherein the X AC/DC modules are disposed in a power cabinet.
 20. An ICT equipment, comprising N power modules and M loads, wherein: a power module is configured to adjust at least one input voltage and output the at least one input voltage to a load to supply power to the load, wherein the N power modules supply power to the M loads, and the power module comprises a rectifier module, a selecting module, and a DC/DC (Direct Current/Direct Current) module, wherein: the rectifier module is configured to rectify an input second alternating current, and convert the second alternating current into a second high voltage direct current for outputting; the selecting module is connected to channels for inputting two high voltage direct currents to the DC/DC module, wherein the two high voltage direct currents comprise the second high voltage direct current and a third high voltage direct current; the selecting module is configured to: when it is detected that the second high voltage direct current is normal, connect a channel for inputting the second high voltage direct current to the DC/DC module and disconnect a channel for inputting the third high voltage direct current to the DC/DC module; when it is detected that the second high voltage direct current is abnormal, connect the channel for inputting the third high voltage direct current to the DC/DC module and disconnect the channel for inputting the second high voltage direct current to the DC/DC module; and the DC/DC module is configured to convert the input second high voltage direct current or the third high voltage direct current into a low voltage direct current, and output the low voltage direct current to the load for use; wherein N and M are integers greater than
 0. 21. The ICT equipment according to claim 20, wherein the power module further comprises a first EMI (Electromagnetic Interference) module, wherein: the first EMI module is configured to filter the third high voltage direct current, and output the filtered third high voltage direct current to the selecting module.
 22. The ICT equipment according to claim 20, wherein the power module further comprises: a second EMI module, configured to filter the input second alternating current, and output the filtered second alternating current to the rectifier module.
 23. The ICT equipment according to claim 20, wherein the power module further comprises: a PFC (Power Factor Correction) module, configured to perform power factor correction for a voltage after the second alternating current is rectified.
 24. The ICT equipment according to claim 20, further comprising m power modules, wherein the m power modules are used for redundant backup, and m is an integer greater than zero.
 25. The ICT equipment according to claim 24, further comprising a low voltage bus, wherein DC/DC modules of the N power modules and the m power modules output the low voltage direct current to the low voltage bus, and the M loads are connected to the low voltage bus so that power is supplied to the M loads.
 26. The ICT equipment according to claim 25, wherein an overcurrent protection module is connected between at least one load in the M loads and the low voltage bus, wherein the overcurrent protection module is configured to provide overcurrent protection for the at least one load connected to the overcurrent protection module.
 27. The ICT equipment according to claim 25, wherein the M loads are divided into multiple load areas, wherein each load area comprises at least one load, and each load area is connected to the low voltage bus so that power is supplied to the M loads.
 28. The ICT equipment according to claim 27, wherein an overcurrent protection module is connected between at least one load area in the multiple load areas and the low voltage bus, wherein the overcurrent protection module is configured to provide overcurrent protection for the at least one load area connected to the overcurrent protection module.
 29. The ICT equipment according to claim 20, wherein the selecting module comprises: a first voltage detecting module, configured to detect a voltage of the second high voltage direct current and that of the third high voltage direct current, and when detecting that the voltage of the second high voltage direct current is normal, output a disconnection signal to a second driver module and output a connection signal to a first driver module; when detecting that the voltage of the second high voltage direct current is abnormal, output a disconnection signal to the first driver module and output a connection signal to the second driver module; the first driver module, configured to trigger, when receiving the disconnection signal, a first switch module to disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and trigger, when receiving the connection signal and after the channel for inputting the third high voltage direct current to the DC/DC module is disconnected, the first switch module to connect the channel for inputting the second high voltage direct current to the DC/DC module; the second driver module, configured to trigger, when receiving the connection signal and after the channel for inputting the second high voltage direct current to the DC/DC module is disconnected, a second switch module to connect the channel for inputting the third high voltage direct current to the DC/DC module, and trigger, when receiving the disconnection signal, the second switch module to disconnect the channel for inputting the third high voltage direct current to the DC/DC module; the first switch module, connected between the second high voltage direct current and the DC/DC module, and configured to respond to driving of the first driver module, disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and connect the channel for inputting the second high voltage direct current to the DC/DC module; and the second switch module, connected between the third high voltage direct current and the DC/DC module, and configured to respond to driving of the second driver module, disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and connect the channel for inputting the third high voltage direct current to the DC/DC module.
 30. The ICT equipment according to claim 20, wherein the selecting module comprises: a second voltage detecting module, configured to: detect a voltage of the second high voltage direct current and that of the third high voltage direct current, and when detecting that the voltage of the second high voltage direct current is normal, output, to a third driver module, a signal for disconnecting the channel for inputting the third high voltage direct current to the DC/DC module, and a signal for connecting the channel for inputting the second high voltage direct current to the DC/DC module; when detecting that the voltage of the second high voltage direct current is abnormal, output, to the third driver module, a signal for disconnecting the channel for inputting the second high voltage direct current to the DC/DC module, and a signal for connecting the channel for inputting the third high voltage direct current to the DC/DC module; the third driver module, configured to: trigger, when receiving the signal for disconnecting the channel for inputting the second high voltage direct current to the DC/DC module, and the signal for connecting the channel for inputting the third high voltage direct current to the DC/DC module, a third switch module to disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and then trigger the third switch module to connect the channel for inputting the third high voltage direct current to the DC/DC module; and trigger, when receiving the signal for disconnecting the channel for inputting the third high voltage direct current to the DC/DC module, and the signal for connecting the channel for inputting the second high voltage direct current to the DC/DC module, the third switch module to disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and then trigger the third switch module to connect the channel for inputting the second high voltage direct current to the DC/DC module; and the third switch module, connected between two high voltage direct currents and the DC/DC module, wherein the two high voltage direct currents are the second high voltage direct current and the third high voltage direct current, and configured to respond to driving of the third driver module, disconnect the channel for inputting the second high voltage direct current to the DC/DC module, and then connect the channel for inputting the third high voltage direct current to the DC/DC module; and respond to driving of the third driver module, disconnect the channel for inputting the third high voltage direct current to the DC/DC module, and then connect the channel for inputting the second high voltage direct current to the DC/DC module. 